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();
		}
	}
}