import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

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

  static class A {
    public void solve(int testNumber, Scanner in, PrintWriter out) {
      String N = in.next();

      if (N.contains("7")) {
        out.print("Yes");
      } else {
        out.print("No");
      }
    }

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

  static class A {
    public void solve(int testNumber, Scanner in, PrintWriter out) {
      String N = in.next();

      if (N.contains("7")) {
        out.print("Yes");
      } else {
        out.print("No");
      }
    }

  }
} Main public static void main(String[] args) {
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;
    Scanner in = new Scanner(inputStream);
    PrintWriter out = new PrintWriter(outputStream);
    A solver = new A();
    solver.solve(1, in, out);
    out.close();
  } main {
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;
    Scanner in = new Scanner(inputStream);
    PrintWriter out = new PrintWriter(outputStream);
    A solver = new A();
    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 Scanner in = new Scanner(inputStream); in new Scanner(inputStream) PrintWriter out = new PrintWriter(outputStream); out new PrintWriter(outputStream) A solver = new A(); solver new A() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class A {
    public void solve(int testNumber, Scanner in, PrintWriter out) {
      String N = in.next();

      if (N.contains("7")) {
        out.print("Yes");
      } else {
        out.print("No");
      }
    }

  } A public void solve(int testNumber, Scanner in, PrintWriter out) {
      String N = in.next();

      if (N.contains("7")) {
        out.print("Yes");
      } else {
        out.print("No");
      }
    } solve {
      String N = in.next();

      if (N.contains("7")) {
        out.print("Yes");
      } else {
        out.print("No");
      }
    } String N = in.next(); N in.next() in.next in if (N.contains("7")) {
        out.print("Yes");
      } else {
        out.print("No");
      } N.contains("7") N.contains N "7" {
        out.print("Yes");
      } out.print("Yes") out.print out "Yes" {
        out.print("No");
      } out.print("No") out.print out "No" int testNumber testNumber Scanner in in PrintWriter out out public class Main {
  public static void main(String[] args) {
    InputStream inputStream = System.in;
    OutputStream outputStream = System.out;
    Scanner in = new Scanner(inputStream);
    PrintWriter out = new PrintWriter(outputStream);
    A solver = new A();
    solver.solve(1, in, out);
    out.close();
  }

  static class A {
    public void solve(int testNumber, Scanner in, PrintWriter out) {
      String N = in.next();

      if (N.contains("7")) {
        out.print("Yes");
      } else {
        out.print("No");
      }
    }

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

  static class A {
    public void solve(int testNumber, Scanner in, PrintWriter out) {
      String N = in.next();

      if (N.contains("7")) {
        out.print("Yes");
      } else {
        out.print("No");
      }
    }

  }
} Main
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

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

  static class A {
    public void solve(int testNumber, Scanner in, PrintWriter out) {
      String N = in.next();

      if (N.contains("7")) {
        out.print("Yes");
      } else {
        out.print("No");
      }
    }

  }
}

