#include <bits/stdc++.h>
#define rep(i,n) for (int i=0; i<(n); ++i)
using namespace std;
using ll=long long;
int main(){
    string s;
    cin>>s;
    string ans="Done!";
    rep(i,s.length()){
        if(s[i]!='A'&&s[i]!='C'&&s[i]!=','){
            ans="Failed...";
        }
    }
    cout<<ans<<endl;
}