DouKaku?

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Sample139 {
    public static final int MOVE = 3;

    public static String calc(String input) {
        StringBuilder builder = new StringBuilder();
        for (char c: input.toCharArray()) {
            char d = (char) (c - MOVE);
            if (d < 'A') d = (char) (d + ('Z' - 'A' + 1));
            builder.append(d);
        }
        return builder.toString();
    }

    public static void main(String[] args) {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        try {
            System.out.println(calc(reader.readLine()));
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}