#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
using ll = long long;
using namespace std;
const int INF = 1e9;

int main() {
    string S,buf;
    cin >> S;
    stringstream ss{S};
    bool flag = true;

    while(getline(ss,buf,',')){
        if(buf!="AC")
            flag = false;
    }

    flag ? cout << "Done!" : cout << "Failed...";
    cout << endl;

    return 0;
}