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.io.*;
 
public class Main{
    
	public static void main(String[] $){
		Scanner s = new Scanner(System.in);
        String C = s.next();
        System.out.println((char)(C.charAt(0) + 1));

	}
} 