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.*;
public class Main{
 	public static void main(String[] args){
    	Scanner stdIn = new Scanner(System.in);
      	String n = stdIn.next();
      	char nn = n.charAt(0);
      System.out.println(++nn);
 	 
  
    }
}