#include <iostream>
using namespace std;
int main(){
    string s;cin>>s;
    string z = "";
    for(int i = 0; s.size() > i; i++){
        if(s[i] == ','){
            if(z != "AC"){
                cout << "Failed..." << endl;
                return 0;
            }
            z = "";
        }else{
            z = z+s[i];
        }
    }
    if(z != "AC")cout << "Failed..." << endl;
    else cout << "Done!" << endl;
}