#include <bits/stdc++.h>
using namespace std;

int main(){
    string s;
    cin>>s;
    bool flag=true;
    for(int i=0;i<s.size();i++){
        if(s[i]!='A'&&s[i]!='C'&&s[i]!=',')
            flag=false;
    }
    if(flag) cout<<"Done!"<<endl;
    else cout<<"Failed..."<<endl;
    return 0;
}