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 <bits/stdc++.h>
using namespace std;

int main(){
  char i;
  cin>>i;
  i++;
  cout<<i<<endl;
}