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>
char alp[2];
int main(void){
  scanf("%s",alp);
  alp[0]++;
  printf("%s",alp);
}