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

int main(){
    string s; cin >> s;
    if(s.size()%3!=0){
        cout << "Failed..." << endl;
        return 0;
    }

    for(int i=0; i<s.size(); i+=3){
        if(s.substr(i,3) != "AC,"){
            cout << "Failed..." << endl;
            return 0;
        }
    }

    cout << "Done!" << endl;
}