import java.util.*;

class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String d = sc.next();
char[] c = d.toCharArray();
int f =c[0];
f++;
char a = (char)f;
System.out.println(a);
}
}

/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