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.*;

public class Main {

    public static void main(String[] args) {

        Scanner s = new Scanner(System.in);
        char c = s.next().charAt(0);
        if(c != 'z')
        {
            c++;
            System.out.println(c);

        }


    }
}