import java.util.Scanner;

public class Main {
 
	public static void main(String[] args) {
 
		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();
		char[] str = s.toCharArray();

		int num = str[0] + 1;
		char c  = (char)(num);

		System.out.print(c);
 
		sc.close();
 
	}
}
/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