package yukicoder;

import java.util.Scanner;

public class Yuki7 {
	
	/*
	 * うーさー暗号
	 */
	public static void main(String[] args) {
		char[] arc = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
		Scanner scan = new Scanner(System.in);
		String str = scan.next();
		scan.close();
			
		for (int i = 0; i < str.length(); i++) {
			for (int j =0; j < arc.length; j++ ) {
				
				if(str.charAt(i) == arc[j]){
					int num = (j-(i+1)%26);
					if(num < 0) {
						System.out.print(arc[26 + num]);
					} else {
						System.out.print(arc[num]);
					}
				}
			}
		}
	}
}