#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<vector>
#include<string.h>
#include<math.h>
using namespace std;

int syc(long i,long Min,long Max){
	if(Min <= i && i <= Max){
		return 1;
	}else{
		exit(1);
		//return 0;
	}
}

int main(){
	string s,temp="";
	int cnm=0;
	cin >> s;
	for(int i=0;i<s.length();i++){
		temp += s[i];
		if(s[i] == ','){
			cnm++;
			if(temp == "AC,"){
				temp="";
			}else{
				cout << "Failed..." << endl;
				return 0;
			}
		}	
	}
	
	if(cnm==0){
		if(temp=="AC"){
			cout << "Done!" << endl;
		}else{
			cout << "Failed..." << endl;
		}
	}else{
		cout << "Done!" << endl;
	}
	
	return 0;
}