import java.util.*;

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