#include<iostream>

using namespace std;

int main(){
    string S;
    cin>>S;
    for(unsigned int i=0;i<S.size();i++){
        if(!(S[i]=='A'||S[i]=='C'||S[i]==',')){
            cout<<"Failed..."<<endl;        
            return 0;
        }
    }
    cout<<"Done!"<<endl;
}