#include<iostream>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using namespace std;

int main(){
    string s;
    cin >> s;
    int i = 0;
    while (i < s.size()-1){
        if (s[i] == 'A') i += 3;
        else {
            cout << "Failed..." << endl;
            return 0;
        } 
    }
    cout << "Done!" << endl;
}