import java.util.Scanner;
	

public class Main{
	
	
	public static void main(String args[])throws Exception{
		
		Scanner sc = new Scanner(System.in);
		String S = sc.next();
		int L = S.length();
		char[] retu = new char[26];
		for(char c='A';c<='Z';c++){
			retu[c-'A'] = c;
		}
		for(int i=0;i<L;i++){
			System.out.print(retu[(S.charAt(i)-'A'-(i+1)+L*26)%26]);
		}
	}
	
}