import java.util.Scanner;
class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      	String s = sc.next();
      	switch(s){
          case "A":
          case "B":
          case "C":
          case "D":
          case "E":
          case "F":
          case "G":
          case "H":
          case "I":
          case "J":
          case "K":
          case "L":
          case "M":
          case "N":
          case "O":
          case "P":
          case "Q":
          case "R":
          case "S":
          case "T":
          case "U":
          case "V":
          case "W":
          case "X":
          case "Y":
          case "Z":
            System.out.println("A");
            break;}
      	switch(s){
          case "a":
          case "b":
          case "c":
          case "d":
          case "e":
          case "f":
          case "g":
          case "h":
          case "i":
          case "j":
          case "k":
          case "l":
          case "m":
          case "n":
          case "o":
          case "p":
          case "q":
          case "r":
          case "s":
          case "t":
          case "u":
          case "v":
          case "w":
          case "x":
          case "y":
          case "z":
            System.out.println("a");
        
              
            
              
        }
    }
} import java.util.Scanner; Scanner java.util class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      	String s = sc.next();
      	switch(s){
          case "A":
          case "B":
          case "C":
          case "D":
          case "E":
          case "F":
          case "G":
          case "H":
          case "I":
          case "J":
          case "K":
          case "L":
          case "M":
          case "N":
          case "O":
          case "P":
          case "Q":
          case "R":
          case "S":
          case "T":
          case "U":
          case "V":
          case "W":
          case "X":
          case "Y":
          case "Z":
            System.out.println("A");
            break;}
      	switch(s){
          case "a":
          case "b":
          case "c":
          case "d":
          case "e":
          case "f":
          case "g":
          case "h":
          case "i":
          case "j":
          case "k":
          case "l":
          case "m":
          case "n":
          case "o":
          case "p":
          case "q":
          case "r":
          case "s":
          case "t":
          case "u":
          case "v":
          case "w":
          case "x":
          case "y":
          case "z":
            System.out.println("a");
        
              
            
              
        }
    }
} Main public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      	String s = sc.next();
      	switch(s){
          case "A":
          case "B":
          case "C":
          case "D":
          case "E":
          case "F":
          case "G":
          case "H":
          case "I":
          case "J":
          case "K":
          case "L":
          case "M":
          case "N":
          case "O":
          case "P":
          case "Q":
          case "R":
          case "S":
          case "T":
          case "U":
          case "V":
          case "W":
          case "X":
          case "Y":
          case "Z":
            System.out.println("A");
            break;}
      	switch(s){
          case "a":
          case "b":
          case "c":
          case "d":
          case "e":
          case "f":
          case "g":
          case "h":
          case "i":
          case "j":
          case "k":
          case "l":
          case "m":
          case "n":
          case "o":
          case "p":
          case "q":
          case "r":
          case "s":
          case "t":
          case "u":
          case "v":
          case "w":
          case "x":
          case "y":
          case "z":
            System.out.println("a");
        
              
            
              
        }
    } main {
    	Scanner sc = new Scanner(System.in);
      	String s = sc.next();
      	switch(s){
          case "A":
          case "B":
          case "C":
          case "D":
          case "E":
          case "F":
          case "G":
          case "H":
          case "I":
          case "J":
          case "K":
          case "L":
          case "M":
          case "N":
          case "O":
          case "P":
          case "Q":
          case "R":
          case "S":
          case "T":
          case "U":
          case "V":
          case "W":
          case "X":
          case "Y":
          case "Z":
            System.out.println("A");
            break;}
      	switch(s){
          case "a":
          case "b":
          case "c":
          case "d":
          case "e":
          case "f":
          case "g":
          case "h":
          case "i":
          case "j":
          case "k":
          case "l":
          case "m":
          case "n":
          case "o":
          case "p":
          case "q":
          case "r":
          case "s":
          case "t":
          case "u":
          case "v":
          case "w":
          case "x":
          case "y":
          case "z":
            System.out.println("a");
        
              
            
              
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc switch(s){
          case "A":
          case "B":
          case "C":
          case "D":
          case "E":
          case "F":
          case "G":
          case "H":
          case "I":
          case "J":
          case "K":
          case "L":
          case "M":
          case "N":
          case "O":
          case "P":
          case "Q":
          case "R":
          case "S":
          case "T":
          case "U":
          case "V":
          case "W":
          case "X":
          case "Y":
          case "Z":
            System.out.println("A");
            break;} s case "A": "A" case "A": case "B": "B" case "B": case "C": "C" case "C": case "D": "D" case "D": case "E": "E" case "E": case "F": "F" case "F": case "G": "G" case "G": case "H": "H" case "H": case "I": "I" case "I": case "J": "J" case "J": case "K": "K" case "K": case "L": "L" case "L": case "M": "M" case "M": case "N": "N" case "N": case "O": "O" case "O": case "P": "P" case "P": case "Q": "Q" case "Q": case "R": "R" case "R": case "S": "S" case "S": case "T": "T" case "T": case "U": "U" case "U": case "V": "V" case "V": case "W": "W" case "W": case "X": "X" case "X": case "Y": "Y" case "Y": case "Z": "Z" case "Z": System.out.println("A") System.out.println System.out System System.out "A" break; switch(s){
          case "a":
          case "b":
          case "c":
          case "d":
          case "e":
          case "f":
          case "g":
          case "h":
          case "i":
          case "j":
          case "k":
          case "l":
          case "m":
          case "n":
          case "o":
          case "p":
          case "q":
          case "r":
          case "s":
          case "t":
          case "u":
          case "v":
          case "w":
          case "x":
          case "y":
          case "z":
            System.out.println("a");
        
              
            
              
        } s case "a": "a" case "a": case "b": "b" case "b": case "c": "c" case "c": case "d": "d" case "d": case "e": "e" case "e": case "f": "f" case "f": case "g": "g" case "g": case "h": "h" case "h": case "i": "i" case "i": case "j": "j" case "j": case "k": "k" case "k": case "l": "l" case "l": case "m": "m" case "m": case "n": "n" case "n": case "o": "o" case "o": case "p": "p" case "p": case "q": "q" case "q": case "r": "r" case "r": case "s": "s" case "s": case "t": "t" case "t": case "u": "u" case "u": case "v": "v" case "v": case "w": "w" case "w": case "x": "x" case "x": case "y": "y" case "y": case "z": "z" case "z": System.out.println("a") System.out.println System.out System System.out "a" String[] args args
import java.util.Scanner;
class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      	String s = sc.next();
      	switch(s){
          case "A":
          case "B":
          case "C":
          case "D":
          case "E":
          case "F":
          case "G":
          case "H":
          case "I":
          case "J":
          case "K":
          case "L":
          case "M":
          case "N":
          case "O":
          case "P":
          case "Q":
          case "R":
          case "S":
          case "T":
          case "U":
          case "V":
          case "W":
          case "X":
          case "Y":
          case "Z":
            System.out.println("A");
            break;}
      	switch(s){
          case "a":
          case "b":
          case "c":
          case "d":
          case "e":
          case "f":
          case "g":
          case "h":
          case "i":
          case "j":
          case "k":
          case "l":
          case "m":
          case "n":
          case "o":
          case "p":
          case "q":
          case "r":
          case "s":
          case "t":
          case "u":
          case "v":
          case "w":
          case "x":
          case "y":
          case "z":
            System.out.println("a");
        
              
            
              
        }
    }
}