Given is a lowercase English letter C that is not `z`. Print the letter that follows C in alphabetical order.

Constraints

* C is a lowercase English letter that is not `z`.

Input

Input is given from Standard Input in the following format:


C


Output

Print the letter that follows C in alphabetical order.

Examples

Input

a


Output

b


Input

y


Output

z
import java.util.Scanner;
public class Main {
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      	char ch = sc.next().charAt(0);
      	System.out.println(Character.toString((char)(ch + 1)));
	}
}