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

int main() {
    string s; cin >> s;
    set<char> st;
    for (int i = 0; i < s.size(); i++) st.insert(s[i]);
    if (st.count('W') || st.count('E')) cout << "Failed...\n";
    else cout << "Done!\n"; 
    return 0;
}