#include <iostream>
#include <string>

using namespace std;

int main(){
    string str;
    cin >> str;
    for(int i = 0; i < str.size(); i += 3){
        if(str.size() < i + 2 || str.substr(i, 2) != "AC"){
            cout << "Failed...\n";
            return 0;
        }
    }
    cout << "Done!\n";
}