#include<bits/stdc++.h> using namespace std; set<string> st; int main() { int n; cin >> n; for(int i = 0; i < n; i ++) { string k; cin >> k; string temp; cin >> temp; bool ok = true; ok &= (st.find(k) == st.end()); while(true) { cin >> temp; if(temp == ";") break; if(st.find(temp) == st.end()) ok = false; } if(ok) { st.insert(k); cout << "ok\n"; } else cout << "greska\n"; } return 0; }