import java.util.*;

class Main {

	public static void main(String args[]){
		
		Scanner scan = new Scanner(System.in);
		char ch = scan.next().charAt(0);
		
		System.out.println(++ch);
		
	}

}
/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