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
#include <stdio.h>


int main ()
{
char K;

scanf ("%c", &K);

K=K+1;
printf("%c", K);



	return 0;
	}