import java.util.*;

class No0013{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		char[] st = new char[s.length()];
		int res = 0;

		for(int i = 0; i < s.length(); i++){
			st[i] = s.charAt(i);
			res = (int)(st[i] - i - 1);
			while(res < 'A'){
				res += 26;
			}
			st[i] = (char)res;

			System.out.print(st[i]);
		}
		System.out.println();
	}
}