#include <bits/stdc++.h>

using namespace std;

int main() {
    const string USER = "1111";
    const string PASSWORD = "9999";

    string user, password;
    cin >> user >> password;
    if (USER == user && PASSWORD == password) {
        cout << "welcome" << endl;
    } else {
        cout << "error" << endl;
    }
    return 0;
}