import java.util.Scanner;

public class Main {
    public static void main(String args[]){
        Scanner stdIn = new Scanner(System.in);
        
        //int a = stdIn.nextInt();
        //int b = stdIn.nextInt();
        //int num[] = new int[3];
        String s = stdIn.next();
        char c[] = s.toCharArray();
        //int sum = 0;
        boolean flag = true;
        
        for(int i = 0; i < s.length(); i++){
            if(c[i] == 'A' || c[i] == 'C' || c[i] == ','){
                
            }else{
                flag = false;
                break;
            }
        }
        
        if(flag){
            System.out.println("Done!");
        }else{
            System.out.println("Failed...");
        }
        
        //System.out.println();
        //System.out.print();
    }
}