import java.util.Scanner;

public class Main{
 public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   String s=kbd.next();
   if(s.equals("A")||s.equals("B")||s.equals("C")||s.equals("D")||s.equals("E")||s.equals("F")||s.equals("G")||s.equals("H")||s.equals("I")||s.equals("J")||
   s.equals("K")||s.equals("L")||s.equals("M")||s.equals("N")||s.equals("O")||s.equals("P")||s.equals("Q")||s.equals("R")||s.equals("S")||s.equals("T")||
   s.equals("U")||s.equals("V")||s.equals("W")||s.equals("X")||s.equals("Y")||s.equals("Z")){
     System.out.println("A");
   }else{
      System.out.println("a");
   }
 }
} import java.util.Scanner; Scanner java.util public class Main{
 public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   String s=kbd.next();
   if(s.equals("A")||s.equals("B")||s.equals("C")||s.equals("D")||s.equals("E")||s.equals("F")||s.equals("G")||s.equals("H")||s.equals("I")||s.equals("J")||
   s.equals("K")||s.equals("L")||s.equals("M")||s.equals("N")||s.equals("O")||s.equals("P")||s.equals("Q")||s.equals("R")||s.equals("S")||s.equals("T")||
   s.equals("U")||s.equals("V")||s.equals("W")||s.equals("X")||s.equals("Y")||s.equals("Z")){
     System.out.println("A");
   }else{
      System.out.println("a");
   }
 }
} Main public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   String s=kbd.next();
   if(s.equals("A")||s.equals("B")||s.equals("C")||s.equals("D")||s.equals("E")||s.equals("F")||s.equals("G")||s.equals("H")||s.equals("I")||s.equals("J")||
   s.equals("K")||s.equals("L")||s.equals("M")||s.equals("N")||s.equals("O")||s.equals("P")||s.equals("Q")||s.equals("R")||s.equals("S")||s.equals("T")||
   s.equals("U")||s.equals("V")||s.equals("W")||s.equals("X")||s.equals("Y")||s.equals("Z")){
     System.out.println("A");
   }else{
      System.out.println("a");
   }
 } main {
   Scanner kbd =new Scanner(System.in);
   String s=kbd.next();
   if(s.equals("A")||s.equals("B")||s.equals("C")||s.equals("D")||s.equals("E")||s.equals("F")||s.equals("G")||s.equals("H")||s.equals("I")||s.equals("J")||
   s.equals("K")||s.equals("L")||s.equals("M")||s.equals("N")||s.equals("O")||s.equals("P")||s.equals("Q")||s.equals("R")||s.equals("S")||s.equals("T")||
   s.equals("U")||s.equals("V")||s.equals("W")||s.equals("X")||s.equals("Y")||s.equals("Z")){
     System.out.println("A");
   }else{
      System.out.println("a");
   }
 } Scanner kbd =new Scanner(System.in); kbd new Scanner(System.in) String s=kbd.next(); s kbd.next() kbd.next kbd if(s.equals("A")||s.equals("B")||s.equals("C")||s.equals("D")||s.equals("E")||s.equals("F")||s.equals("G")||s.equals("H")||s.equals("I")||s.equals("J")||
   s.equals("K")||s.equals("L")||s.equals("M")||s.equals("N")||s.equals("O")||s.equals("P")||s.equals("Q")||s.equals("R")||s.equals("S")||s.equals("T")||
   s.equals("U")||s.equals("V")||s.equals("W")||s.equals("X")||s.equals("Y")||s.equals("Z")){
     System.out.println("A");
   }else{
      System.out.println("a");
   } s.equals("A")||s.equals("B")||s.equals("C")||s.equals("D")||s.equals("E")||s.equals("F")||s.equals("G")||s.equals("H")||s.equals("I")||s.equals("J")||
   s.equals("K")||s.equals("L")||s.equals("M")||s.equals("N")||s.equals("O")||s.equals("P")||s.equals("Q")||s.equals("R")||s.equals("S")||s.equals("T")||
   s.equals("U")||s.equals("V")||s.equals("W")||s.equals("X")||s.equals("Y")||s.equals("Z") s.equals("Y") s.equals("X") s.equals("W") s.equals("V") s.equals("U") s.equals("T") s.equals("S") s.equals("R") s.equals("Q") s.equals("P") s.equals("O") s.equals("N") s.equals("M") s.equals("L") s.equals("K") s.equals("J") s.equals("I") s.equals("H") s.equals("G") s.equals("F") s.equals("E") s.equals("D") s.equals("C") s.equals("A")||s.equals("B")||s.equals("C")||s.equals("D")||s.equals("E")||s.equals("F")||s.equals("G")||s.equals("H")||s.equals("I")||s.equals("J")||
   s.equals("K")||s.equals("L")||s.equals("M")||s.equals("N")||s.equals("O")||s.equals("P")||s.equals("Q")||s.equals("R")||s.equals("S")||s.equals("T")||
   s.equals("U")||s.equals("V")||s.equals("W")||s.equals("X")||s.equals("Y")||s.equals("Z") s.equals("A") s.equals s "A" s.equals("B") s.equals s "B" s.equals("C") s.equals s "C" s.equals("D") s.equals s "D" s.equals("E") s.equals s "E" s.equals("F") s.equals s "F" s.equals("G") s.equals s "G" s.equals("H") s.equals s "H" s.equals("I") s.equals s "I" s.equals("J") s.equals s "J" s.equals("K") s.equals s "K" s.equals("L") s.equals s "L" s.equals("M") s.equals s "M" s.equals("N") s.equals s "N" s.equals("O") s.equals s "O" s.equals("P") s.equals s "P" s.equals("Q") s.equals s "Q" s.equals("R") s.equals s "R" s.equals("S") s.equals s "S" s.equals("T") s.equals s "T" s.equals("U") s.equals s "U" s.equals("V") s.equals s "V" s.equals("W") s.equals s "W" s.equals("X") s.equals s "X" s.equals("Y") s.equals s "Y" s.equals("Z") s.equals s "Z" {
     System.out.println("A");
   } System.out.println("A") System.out.println System.out System System.out "A" {
      System.out.println("a");
   } System.out.println("a") System.out.println System.out System System.out "a" String[] args args public class Main{
 public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   String s=kbd.next();
   if(s.equals("A")||s.equals("B")||s.equals("C")||s.equals("D")||s.equals("E")||s.equals("F")||s.equals("G")||s.equals("H")||s.equals("I")||s.equals("J")||
   s.equals("K")||s.equals("L")||s.equals("M")||s.equals("N")||s.equals("O")||s.equals("P")||s.equals("Q")||s.equals("R")||s.equals("S")||s.equals("T")||
   s.equals("U")||s.equals("V")||s.equals("W")||s.equals("X")||s.equals("Y")||s.equals("Z")){
     System.out.println("A");
   }else{
      System.out.println("a");
   }
 }
} public class Main{
 public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   String s=kbd.next();
   if(s.equals("A")||s.equals("B")||s.equals("C")||s.equals("D")||s.equals("E")||s.equals("F")||s.equals("G")||s.equals("H")||s.equals("I")||s.equals("J")||
   s.equals("K")||s.equals("L")||s.equals("M")||s.equals("N")||s.equals("O")||s.equals("P")||s.equals("Q")||s.equals("R")||s.equals("S")||s.equals("T")||
   s.equals("U")||s.equals("V")||s.equals("W")||s.equals("X")||s.equals("Y")||s.equals("Z")){
     System.out.println("A");
   }else{
      System.out.println("a");
   }
 }
} Main
import java.util.Scanner;

public class Main{
 public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   String s=kbd.next();
   if(s.equals("A")||s.equals("B")||s.equals("C")||s.equals("D")||s.equals("E")||s.equals("F")||s.equals("G")||s.equals("H")||s.equals("I")||s.equals("J")||
   s.equals("K")||s.equals("L")||s.equals("M")||s.equals("N")||s.equals("O")||s.equals("P")||s.equals("Q")||s.equals("R")||s.equals("S")||s.equals("T")||
   s.equals("U")||s.equals("V")||s.equals("W")||s.equals("X")||s.equals("Y")||s.equals("Z")){
     System.out.println("A");
   }else{
      System.out.println("a");
   }
 }
}
