import java.util.Scanner;
import java.util.ArrayList;
import java.util.Collections;

public class Main{
    Scanner scan = new Scanner(System.in);
    char[] C;
    char next;

    Main(){
        C = scan.nextLine().toCharArray();
        next = C[0];
        next = (char)(C[0] + 1);
        System.out.println(next);
    }

    public static void main(String[] args){
        new Main();
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz