dacase.java

//Convertanupper-caselettertoalowercaseletterandreturnthelower
//case letter. (Hint: Check first to be sure that it is not lower case already.)
	import java.util.Scanner;
	public class dacase {
		public static void main(String[]args){
		
			Scanner input = new Scanner(System.in);

			char a = input.nextln();
			char b = a.charAt(0);
			char x = check(b);
			System.out.println(x);	

		}
		public static char check(char b){
			char b = b.toLowerCase;
			return b;
		}
	}