import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        for (char c : sc.next().toCharArray()) {
            if (c != 'A' && c != 'C' && c != ',') {
                System.out.println("Failed...");
                return;
            }
        }
        System.out.println("Done!");
    }
}