import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.BufferedWriter;
import java.io.Writer;
import java.io.OutputStreamWriter;
import java.util.InputMismatchException;
import java.io.IOException;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 * @author GYSHGX868
 */
public class Main {
  public static void main(String[] args) {
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;
    InputReader in = new InputReader(inputStream);
    OutputWriter out = new OutputWriter(outputStream);
    TaskB solver = new TaskB();
    solver.solve(1, in, out);
    out.close();
  }

  static class TaskB {
    public void solve(int testNumber, InputReader in, OutputWriter out) {
      String s = in.nextString();
      int start = s.length();
      for (int i = 0; i < s.length(); i++) {
        if (s.charAt(i) == 'A') {
          start = i;
          break;
        }
      }
      int end = 0;
      for (int i = s.length() - 1; i >= 0; i--) {
        if (s.charAt(i) == 'Z') {
          end = i;
          break;
        }
      }
      out.printLine(Math.max(0, end - start + 1));
    }

  }

  static class InputReader {
    private InputStream stream;
    private byte[] buf = new byte[1024];
    private int curChar;
    private int numChars;
    private InputReader.SpaceCharFilter filter;

    public InputReader(InputStream stream) {
      this.stream = stream;
    }

    public int read() {
      if (numChars == -1) {
        throw new InputMismatchException();
      }
      if (curChar >= numChars) {
        curChar = 0;
        try {
          numChars = stream.read(buf);
        } catch (IOException e) {
          throw new InputMismatchException();
        }
        if (numChars <= 0) {
          return -1;
        }
      }
      return buf[curChar++];
    }

    public String nextString() {
      int c = read();
      while (isSpaceChar(c)) {
        c = read();
      }
      StringBuilder res = new StringBuilder();
      do {
        if (Character.isValidCodePoint(c)) {
          res.appendCodePoint(c);
        }
        c = read();
      } while (!isSpaceChar(c));
      return res.toString();
    }

    public boolean isSpaceChar(int c) {
      if (filter != null) {
        return filter.isSpaceChar(c);
      }
      return isWhitespace(c);
    }

    public static boolean isWhitespace(int c) {
      return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
    }

    public interface SpaceCharFilter {
      boolean isSpaceChar(int ch);

    }

  }

  static class OutputWriter {
    private final PrintWriter writer;

    public OutputWriter(OutputStream outputStream) {
      writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
    }

    public OutputWriter(Writer writer) {
      this.writer = new PrintWriter(writer);
    }

    public void close() {
      writer.close();
    }

    public void printLine(int i) {
      writer.println(i);
    }

  }
}
 import java.io.OutputStream; OutputStream java.io import java.io.IOException; IOException java.io import java.io.InputStream; InputStream java.io import java.io.OutputStream; OutputStream java.io import java.io.PrintWriter; PrintWriter java.io import java.io.BufferedWriter; BufferedWriter java.io import java.io.Writer; Writer java.io import java.io.OutputStreamWriter; OutputStreamWriter java.io import java.util.InputMismatchException; InputMismatchException java.util import java.io.IOException; IOException java.io import java.io.InputStream; InputStream java.io public class Main {
  public static void main(String[] args) {
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;
    InputReader in = new InputReader(inputStream);
    OutputWriter out = new OutputWriter(outputStream);
    TaskB solver = new TaskB();
    solver.solve(1, in, out);
    out.close();
  }

  static class TaskB {
    public void solve(int testNumber, InputReader in, OutputWriter out) {
      String s = in.nextString();
      int start = s.length();
      for (int i = 0; i < s.length(); i++) {
        if (s.charAt(i) == 'A') {
          start = i;
          break;
        }
      }
      int end = 0;
      for (int i = s.length() - 1; i >= 0; i--) {
        if (s.charAt(i) == 'Z') {
          end = i;
          break;
        }
      }
      out.printLine(Math.max(0, end - start + 1));
    }

  }

  static class InputReader {
    private InputStream stream;
    private byte[] buf = new byte[1024];
    private int curChar;
    private int numChars;
    private InputReader.SpaceCharFilter filter;

    public InputReader(InputStream stream) {
      this.stream = stream;
    }

    public int read() {
      if (numChars == -1) {
        throw new InputMismatchException();
      }
      if (curChar >= numChars) {
        curChar = 0;
        try {
          numChars = stream.read(buf);
        } catch (IOException e) {
          throw new InputMismatchException();
        }
        if (numChars <= 0) {
          return -1;
        }
      }
      return buf[curChar++];
    }

    public String nextString() {
      int c = read();
      while (isSpaceChar(c)) {
        c = read();
      }
      StringBuilder res = new StringBuilder();
      do {
        if (Character.isValidCodePoint(c)) {
          res.appendCodePoint(c);
        }
        c = read();
      } while (!isSpaceChar(c));
      return res.toString();
    }

    public boolean isSpaceChar(int c) {
      if (filter != null) {
        return filter.isSpaceChar(c);
      }
      return isWhitespace(c);
    }

    public static boolean isWhitespace(int c) {
      return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
    }

    public interface SpaceCharFilter {
      boolean isSpaceChar(int ch);

    }

  }

  static class OutputWriter {
    private final PrintWriter writer;

    public OutputWriter(OutputStream outputStream) {
      writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
    }

    public OutputWriter(Writer writer) {
      this.writer = new PrintWriter(writer);
    }

    public void close() {
      writer.close();
    }

    public void printLine(int i) {
      writer.println(i);
    }

  }
} Main public static void main(String[] args) {
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;
    InputReader in = new InputReader(inputStream);
    OutputWriter out = new OutputWriter(outputStream);
    TaskB solver = new TaskB();
    solver.solve(1, in, out);
    out.close();
  } main {
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;
    InputReader in = new InputReader(inputStream);
    OutputWriter out = new OutputWriter(outputStream);
    TaskB solver = new TaskB();
    solver.solve(1, in, out);
    out.close();
  } InputStream inputStream = System.in; inputStream System.in System System.in OutputStream outputStream = System.out; outputStream System.out System System.out InputReader in = new InputReader(inputStream); in new InputReader(inputStream) OutputWriter out = new OutputWriter(outputStream); out new OutputWriter(outputStream) TaskB solver = new TaskB(); solver new TaskB() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class TaskB {
    public void solve(int testNumber, InputReader in, OutputWriter out) {
      String s = in.nextString();
      int start = s.length();
      for (int i = 0; i < s.length(); i++) {
        if (s.charAt(i) == 'A') {
          start = i;
          break;
        }
      }
      int end = 0;
      for (int i = s.length() - 1; i >= 0; i--) {
        if (s.charAt(i) == 'Z') {
          end = i;
          break;
        }
      }
      out.printLine(Math.max(0, end - start + 1));
    }

  } TaskB public void solve(int testNumber, InputReader in, OutputWriter out) {
      String s = in.nextString();
      int start = s.length();
      for (int i = 0; i < s.length(); i++) {
        if (s.charAt(i) == 'A') {
          start = i;
          break;
        }
      }
      int end = 0;
      for (int i = s.length() - 1; i >= 0; i--) {
        if (s.charAt(i) == 'Z') {
          end = i;
          break;
        }
      }
      out.printLine(Math.max(0, end - start + 1));
    } solve {
      String s = in.nextString();
      int start = s.length();
      for (int i = 0; i < s.length(); i++) {
        if (s.charAt(i) == 'A') {
          start = i;
          break;
        }
      }
      int end = 0;
      for (int i = s.length() - 1; i >= 0; i--) {
        if (s.charAt(i) == 'Z') {
          end = i;
          break;
        }
      }
      out.printLine(Math.max(0, end - start + 1));
    } String s = in.nextString(); s in.nextString() in.nextString in int start = s.length(); start s.length() s.length s for (int i = 0; i < s.length(); i++) {
        if (s.charAt(i) == 'A') {
          start = i;
          break;
        }
      } int i = 0; int i = 0; i 0 i < s.length() i s.length() s.length s i++ i++ i {
        if (s.charAt(i) == 'A') {
          start = i;
          break;
        }
      } {
        if (s.charAt(i) == 'A') {
          start = i;
          break;
        }
      } if (s.charAt(i) == 'A') {
          start = i;
          break;
        } s.charAt(i) == 'A' s.charAt(i) s.charAt s i 'A' {
          start = i;
          break;
        } start = i start i break; int end = 0; end 0 for (int i = s.length() - 1; i >= 0; i--) {
        if (s.charAt(i) == 'Z') {
          end = i;
          break;
        }
      } int i = s.length() - 1; int i = s.length() - 1; i s.length() - 1 s.length() s.length s 1 i >= 0 i 0 i-- i-- i {
        if (s.charAt(i) == 'Z') {
          end = i;
          break;
        }
      } {
        if (s.charAt(i) == 'Z') {
          end = i;
          break;
        }
      } if (s.charAt(i) == 'Z') {
          end = i;
          break;
        } s.charAt(i) == 'Z' s.charAt(i) s.charAt s i 'Z' {
          end = i;
          break;
        } end = i end i break; out.printLine(Math.max(0, end - start + 1)) out.printLine out Math.max(0, end - start + 1) Math.max Math 0 end - start + 1 end - start end start 1 int testNumber testNumber InputReader in in OutputWriter out out static class InputReader {
    private InputStream stream;
    private byte[] buf = new byte[1024];
    private int curChar;
    private int numChars;
    private InputReader.SpaceCharFilter filter;

    public InputReader(InputStream stream) {
      this.stream = stream;
    }

    public int read() {
      if (numChars == -1) {
        throw new InputMismatchException();
      }
      if (curChar >= numChars) {
        curChar = 0;
        try {
          numChars = stream.read(buf);
        } catch (IOException e) {
          throw new InputMismatchException();
        }
        if (numChars <= 0) {
          return -1;
        }
      }
      return buf[curChar++];
    }

    public String nextString() {
      int c = read();
      while (isSpaceChar(c)) {
        c = read();
      }
      StringBuilder res = new StringBuilder();
      do {
        if (Character.isValidCodePoint(c)) {
          res.appendCodePoint(c);
        }
        c = read();
      } while (!isSpaceChar(c));
      return res.toString();
    }

    public boolean isSpaceChar(int c) {
      if (filter != null) {
        return filter.isSpaceChar(c);
      }
      return isWhitespace(c);
    }

    public static boolean isWhitespace(int c) {
      return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
    }

    public interface SpaceCharFilter {
      boolean isSpaceChar(int ch);

    }

  } InputReader private InputStream stream; stream private byte[] buf = new byte[1024]; buf new byte[1024] 1024 private int curChar; curChar private int numChars; numChars private InputReader.SpaceCharFilter filter; filter public InputReader(InputStream stream) {
      this.stream = stream;
    } InputReader {
      this.stream = stream;
    } this.stream = stream this.stream this this.stream stream InputStream stream stream public int read() {
      if (numChars == -1) {
        throw new InputMismatchException();
      }
      if (curChar >= numChars) {
        curChar = 0;
        try {
          numChars = stream.read(buf);
        } catch (IOException e) {
          throw new InputMismatchException();
        }
        if (numChars <= 0) {
          return -1;
        }
      }
      return buf[curChar++];
    } read {
      if (numChars == -1) {
        throw new InputMismatchException();
      }
      if (curChar >= numChars) {
        curChar = 0;
        try {
          numChars = stream.read(buf);
        } catch (IOException e) {
          throw new InputMismatchException();
        }
        if (numChars <= 0) {
          return -1;
        }
      }
      return buf[curChar++];
    } if (numChars == -1) {
        throw new InputMismatchException();
      } numChars == -1 numChars -1 1 {
        throw new InputMismatchException();
      } throw new InputMismatchException(); new InputMismatchException() if (curChar >= numChars) {
        curChar = 0;
        try {
          numChars = stream.read(buf);
        } catch (IOException e) {
          throw new InputMismatchException();
        }
        if (numChars <= 0) {
          return -1;
        }
      } curChar >= numChars curChar numChars {
        curChar = 0;
        try {
          numChars = stream.read(buf);
        } catch (IOException e) {
          throw new InputMismatchException();
        }
        if (numChars <= 0) {
          return -1;
        }
      } curChar = 0 curChar 0 try {
          numChars = stream.read(buf);
        } catch (IOException e) {
          throw new InputMismatchException();
        } catch (IOException e) {
          throw new InputMismatchException();
        } IOException e {
          throw new InputMismatchException();
        } throw new InputMismatchException(); new InputMismatchException() {
          numChars = stream.read(buf);
        } numChars = stream.read(buf) numChars stream.read(buf) stream.read stream buf if (numChars <= 0) {
          return -1;
        } numChars <= 0 numChars 0 {
          return -1;
        } return -1; -1 1 return buf[curChar++]; buf[curChar++] buf curChar++ curChar public String nextString() {
      int c = read();
      while (isSpaceChar(c)) {
        c = read();
      }
      StringBuilder res = new StringBuilder();
      do {
        if (Character.isValidCodePoint(c)) {
          res.appendCodePoint(c);
        }
        c = read();
      } while (!isSpaceChar(c));
      return res.toString();
    } nextString {
      int c = read();
      while (isSpaceChar(c)) {
        c = read();
      }
      StringBuilder res = new StringBuilder();
      do {
        if (Character.isValidCodePoint(c)) {
          res.appendCodePoint(c);
        }
        c = read();
      } while (!isSpaceChar(c));
      return res.toString();
    } int c = read(); c read() read while (isSpaceChar(c)) {
        c = read();
      } isSpaceChar(c) isSpaceChar c {
        c = read();
      } c = read() c read() read StringBuilder res = new StringBuilder(); res new StringBuilder() do {
        if (Character.isValidCodePoint(c)) {
          res.appendCodePoint(c);
        }
        c = read();
      } while (!isSpaceChar(c)); !isSpaceChar(c) isSpaceChar(c) isSpaceChar c {
        if (Character.isValidCodePoint(c)) {
          res.appendCodePoint(c);
        }
        c = read();
      } if (Character.isValidCodePoint(c)) {
          res.appendCodePoint(c);
        } Character.isValidCodePoint(c) Character.isValidCodePoint Character c {
          res.appendCodePoint(c);
        } res.appendCodePoint(c) res.appendCodePoint res c c = read() c read() read return res.toString(); res.toString() res.toString res public boolean isSpaceChar(int c) {
      if (filter != null) {
        return filter.isSpaceChar(c);
      }
      return isWhitespace(c);
    } isSpaceChar {
      if (filter != null) {
        return filter.isSpaceChar(c);
      }
      return isWhitespace(c);
    } if (filter != null) {
        return filter.isSpaceChar(c);
      } filter != null filter null {
        return filter.isSpaceChar(c);
      } return filter.isSpaceChar(c); filter.isSpaceChar(c) filter.isSpaceChar filter c return isWhitespace(c); isWhitespace(c) isWhitespace c int c c public static boolean isWhitespace(int c) {
      return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
    } isWhitespace {
      return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
    } return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1; c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1 c == '\t' c == '\r' c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1 c == ' ' c ' ' c == '\n' c '\n' c == '\r' c '\r' c == '\t' c '\t' c == -1 c -1 1 int c c public interface SpaceCharFilter {
      boolean isSpaceChar(int ch);

    } SpaceCharFilter boolean isSpaceChar(int ch); isSpaceChar int ch ch static class OutputWriter {
    private final PrintWriter writer;

    public OutputWriter(OutputStream outputStream) {
      writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
    }

    public OutputWriter(Writer writer) {
      this.writer = new PrintWriter(writer);
    }

    public void close() {
      writer.close();
    }

    public void printLine(int i) {
      writer.println(i);
    }

  } OutputWriter private final PrintWriter writer; writer public OutputWriter(OutputStream outputStream) {
      writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
    } OutputWriter {
      writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
    } writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream))) writer new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream))) OutputStream outputStream outputStream public OutputWriter(Writer writer) {
      this.writer = new PrintWriter(writer);
    } OutputWriter {
      this.writer = new PrintWriter(writer);
    } this.writer = new PrintWriter(writer) this.writer this this.writer new PrintWriter(writer) Writer writer writer public void close() {
      writer.close();
    } close {
      writer.close();
    } writer.close() writer.close writer public void printLine(int i) {
      writer.println(i);
    } printLine {
      writer.println(i);
    } writer.println(i) writer.println writer i int i i public class Main {
  public static void main(String[] args) {
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;
    InputReader in = new InputReader(inputStream);
    OutputWriter out = new OutputWriter(outputStream);
    TaskB solver = new TaskB();
    solver.solve(1, in, out);
    out.close();
  }

  static class TaskB {
    public void solve(int testNumber, InputReader in, OutputWriter out) {
      String s = in.nextString();
      int start = s.length();
      for (int i = 0; i < s.length(); i++) {
        if (s.charAt(i) == 'A') {
          start = i;
          break;
        }
      }
      int end = 0;
      for (int i = s.length() - 1; i >= 0; i--) {
        if (s.charAt(i) == 'Z') {
          end = i;
          break;
        }
      }
      out.printLine(Math.max(0, end - start + 1));
    }

  }

  static class InputReader {
    private InputStream stream;
    private byte[] buf = new byte[1024];
    private int curChar;
    private int numChars;
    private InputReader.SpaceCharFilter filter;

    public InputReader(InputStream stream) {
      this.stream = stream;
    }

    public int read() {
      if (numChars == -1) {
        throw new InputMismatchException();
      }
      if (curChar >= numChars) {
        curChar = 0;
        try {
          numChars = stream.read(buf);
        } catch (IOException e) {
          throw new InputMismatchException();
        }
        if (numChars <= 0) {
          return -1;
        }
      }
      return buf[curChar++];
    }

    public String nextString() {
      int c = read();
      while (isSpaceChar(c)) {
        c = read();
      }
      StringBuilder res = new StringBuilder();
      do {
        if (Character.isValidCodePoint(c)) {
          res.appendCodePoint(c);
        }
        c = read();
      } while (!isSpaceChar(c));
      return res.toString();
    }

    public boolean isSpaceChar(int c) {
      if (filter != null) {
        return filter.isSpaceChar(c);
      }
      return isWhitespace(c);
    }

    public static boolean isWhitespace(int c) {
      return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
    }

    public interface SpaceCharFilter {
      boolean isSpaceChar(int ch);

    }

  }

  static class OutputWriter {
    private final PrintWriter writer;

    public OutputWriter(OutputStream outputStream) {
      writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
    }

    public OutputWriter(Writer writer) {
      this.writer = new PrintWriter(writer);
    }

    public void close() {
      writer.close();
    }

    public void printLine(int i) {
      writer.println(i);
    }

  }
} public class Main {
  public static void main(String[] args) {
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;
    InputReader in = new InputReader(inputStream);
    OutputWriter out = new OutputWriter(outputStream);
    TaskB solver = new TaskB();
    solver.solve(1, in, out);
    out.close();
  }

  static class TaskB {
    public void solve(int testNumber, InputReader in, OutputWriter out) {
      String s = in.nextString();
      int start = s.length();
      for (int i = 0; i < s.length(); i++) {
        if (s.charAt(i) == 'A') {
          start = i;
          break;
        }
      }
      int end = 0;
      for (int i = s.length() - 1; i >= 0; i--) {
        if (s.charAt(i) == 'Z') {
          end = i;
          break;
        }
      }
      out.printLine(Math.max(0, end - start + 1));
    }

  }

  static class InputReader {
    private InputStream stream;
    private byte[] buf = new byte[1024];
    private int curChar;
    private int numChars;
    private InputReader.SpaceCharFilter filter;

    public InputReader(InputStream stream) {
      this.stream = stream;
    }

    public int read() {
      if (numChars == -1) {
        throw new InputMismatchException();
      }
      if (curChar >= numChars) {
        curChar = 0;
        try {
          numChars = stream.read(buf);
        } catch (IOException e) {
          throw new InputMismatchException();
        }
        if (numChars <= 0) {
          return -1;
        }
      }
      return buf[curChar++];
    }

    public String nextString() {
      int c = read();
      while (isSpaceChar(c)) {
        c = read();
      }
      StringBuilder res = new StringBuilder();
      do {
        if (Character.isValidCodePoint(c)) {
          res.appendCodePoint(c);
        }
        c = read();
      } while (!isSpaceChar(c));
      return res.toString();
    }

    public boolean isSpaceChar(int c) {
      if (filter != null) {
        return filter.isSpaceChar(c);
      }
      return isWhitespace(c);
    }

    public static boolean isWhitespace(int c) {
      return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
    }

    public interface SpaceCharFilter {
      boolean isSpaceChar(int ch);

    }

  }

  static class OutputWriter {
    private final PrintWriter writer;

    public OutputWriter(OutputStream outputStream) {
      writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
    }

    public OutputWriter(Writer writer) {
      this.writer = new PrintWriter(writer);
    }

    public void close() {
      writer.close();
    }

    public void printLine(int i) {
      writer.println(i);
    }

  }
} Main
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.BufferedWriter;
import java.io.Writer;
import java.io.OutputStreamWriter;
import java.util.InputMismatchException;
import java.io.IOException;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 * @author GYSHGX868
 */
public class Main {
  public static void main(String[] args) {
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;
    InputReader in = new InputReader(inputStream);
    OutputWriter out = new OutputWriter(outputStream);
    TaskB solver = new TaskB();
    solver.solve(1, in, out);
    out.close();
  }

  static class TaskB {
    public void solve(int testNumber, InputReader in, OutputWriter out) {
      String s = in.nextString();
      int start = s.length();
      for (int i = 0; i < s.length(); i++) {
        if (s.charAt(i) == 'A') {
          start = i;
          break;
        }
      }
      int end = 0;
      for (int i = s.length() - 1; i >= 0; i--) {
        if (s.charAt(i) == 'Z') {
          end = i;
          break;
        }
      }
      out.printLine(Math.max(0, end - start + 1));
    }

  }

  static class InputReader {
    private InputStream stream;
    private byte[] buf = new byte[1024];
    private int curChar;
    private int numChars;
    private InputReader.SpaceCharFilter filter;

    public InputReader(InputStream stream) {
      this.stream = stream;
    }

    public int read() {
      if (numChars == -1) {
        throw new InputMismatchException();
      }
      if (curChar >= numChars) {
        curChar = 0;
        try {
          numChars = stream.read(buf);
        } catch (IOException e) {
          throw new InputMismatchException();
        }
        if (numChars <= 0) {
          return -1;
        }
      }
      return buf[curChar++];
    }

    public String nextString() {
      int c = read();
      while (isSpaceChar(c)) {
        c = read();
      }
      StringBuilder res = new StringBuilder();
      do {
        if (Character.isValidCodePoint(c)) {
          res.appendCodePoint(c);
        }
        c = read();
      } while (!isSpaceChar(c));
      return res.toString();
    }

    public boolean isSpaceChar(int c) {
      if (filter != null) {
        return filter.isSpaceChar(c);
      }
      return isWhitespace(c);
    }

    public static boolean isWhitespace(int c) {
      return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
    }

    public interface SpaceCharFilter {
      boolean isSpaceChar(int ch);

    }

  }

  static class OutputWriter {
    private final PrintWriter writer;

    public OutputWriter(OutputStream outputStream) {
      writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
    }

    public OutputWriter(Writer writer) {
      this.writer = new PrintWriter(writer);
    }

    public void close() {
      writer.close();
    }

    public void printLine(int i) {
      writer.println(i);
    }

  }
}

