import java.util.Scanner;

class Main {
    
    public static void main(String[] args) {
        
        No0018 no = new No0018();

        System.out.println(no.result());
        
    }
    
}

class No0018 {
    public static int MIN_CODE = Character.getNumericValue('A');
    public static int MAX_CODE = Character.getNumericValue('Z');
    public static int CHAR_NUM = MAX_CODE - MIN_CODE + 1;
    private String s;
    private String result;
    
    public No0018() {
        Scanner sc = new Scanner(System.in);
        this.s = sc.next();
        StringBuffer sb = new StringBuffer("");
        for (int i = 0; i < this.s.length(); i++) {
            int code = this.s.codePointAt(i) - MIN_CODE + 1;
            code = code - (i + 1);
            if (code > 0) {
                sb.append(Character.toChars(MIN_CODE + code - 1));
            } else {
                code %= CHAR_NUM;
                sb.append(Character.toChars(MIN_CODE - code - 1));
            }
        }
        this.result = sb.toString();
    }
    
    public String result() {
        return this.result;
    }
}