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.*;

class Main {

	public static void main(String args[]){
		
		Scanner scan = new Scanner(System.in);
		char ch = scan.next().charAt(0);
		
		System.out.println(++ch);
		
	}

}