import java.util.Scanner;

/**
 * TITLE : Next Alphabet
 * URL : https://atcoder.jp/contests/abc151/tasks/abc151_a
 */
public class Main {

	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		String C = sc.next();

		char[] c = C.toCharArray();
        System.out.println((char)(c[0] + 0x01));
		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