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 s = new Scanner(System.in);
        char ch = s.next().charAt(0);
        ch++;
      	System.out.println(ch);
    }
}