import java.util.Scanner;

class Test {
	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(System.in);
		String sen = in.next();
		int n = sen.length();
		char[] senArr = sen.toCharArray();
		for(int i=0; i<n; i++) {
			for(int j=0; j<n; j++) {
				if(senArr[j] == 'A') {
					senArr[j] = 'Z';
				} else {
					senArr[j] = (char)(senArr[j] - 1);
				}
			}
			System.out.print(senArr[i]);
		}
	}
}