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 sc = new Scanner(System.in);
    String C = sc.next();
    String A = "abcdefghijklmnopqrstuvwxyz";
    int idx = A.indexOf(C);
    System.out.println(A.substring(idx+1,idx+2));
  }
}
