#include <iostream>
#include <string>
using namespace std;
int main(){
    string str;bool done=true;
    cin >> str;
    if(str[0]!='A')done=false;
    for(int i=0;i<str.size();i++){
        if(str[i]==','){
            if(str[i+1]!='A')done=false;
        }
    }
    if(done)cout << "Done!" << endl;
    else cout << "Failed..." <<endl;
    return 0;
}