import java.util.*;
public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		String a=sc.nextLine();
		for(int i=0;i<a.length();i++) {
			int m =a.charAt(i)-'a';
			if(m==25)
				System.out.print('z');
			else {
				System.out.print((char)(m+1+'a'));
			}
		}
	}
	
}
/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