import java.math.*;
import java.util.*;
	
	public class Main {
	
		public static void main(String[] args) {
		
			Scanner sc = new Scanner(System.in);
			String C = sc.next();
			char[] cchar = C.toCharArray();
			cchar[0]++;
			
			System.out.println(cchar[0]);
			
			
		}
				
	}
	
	
/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