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.*;
import java.lang.*;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String s = sc.next();
		char ch = s.charAt(0);
		ch++;
		System.out.println(ch);
	}
}