import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		//long a = Long.parseLong(sc.next());
		String t = sc.next();
		char[] c = t.toCharArray();
		c[0] = (char) (c[0]+1);
		//long b = Long.parseLong(sc.next());
		//int c = Integer.parseInt(sc.next());
		//int n = Integer.parseInt(sc.next());
		//long res=n;
		//int l = Integer.parseInt(sc.next());
		//int sum=0;
		//String s = sc.next();
		//String t = sc.next();
		//String w = sc.next();
		//int a = Integer.parseInt(sc.next());
		//String t = sc.next();

		/*if() {//a、e、i、o、u
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}*/
		/*for(int i=0;i<t.length();i++) {
			if(t.substring(i,i+1).equals(",")) {
				buff+=" ";
			}else {
				buff+=t.substring(i, i+1);
			}
		}*/
		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