import java.util.*;

class Main {

    public static void main(String args[]){
        Main main = new Main();
    }

    public Main(){
        Scanner S = new Scanner(System.in);
        char C = S.next().charAt(0);
        C++;
        System.out.println(C);
    }

}

/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