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


signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(20);
    
    string s;
    cin>>s;
    bool pos = true;
    int n = s.size();
    for(int i=0;i<n;i++){
        if(i%3==0 && s[i]!='A') pos = false;
        if(i%3==1 && s[i]!='C') pos = false;
        if(i%3==2 && s[i]!=',') pos = false;
    }
    if(pos){
        cout << "Done!\n";
    }
    else cout << "Failed...\n";

}