#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int,int>;
#define rep(i,n) for(int i=0;i<n;i++)

const ll mod = ll(1e9) + 7;
const int INF = 1<<29;

int main(){
    string s;
    cin >> s;
    int a = 0,c = 0;
    rep(i,s.size()){
        if (s[i]=='A') a++;
        else if (s[i]=='C') c++;
    }
    if (a==c && s.size()/3+1==a) cout << "Done!" << endl;
    else cout << "Failed..." << endl;
    return 0;
}