#include <algorithm>
#include <array>
#include <cmath>
#include <cstdio>
#include <iostream>
#include <numeric>
#include <optional>
#include <queue>
#include <unordered_map>
#include <unordered_set>
#include <vector>

using namespace std;

int main() {
    for (auto i = 0; i < 1000; ++i) {
        printf("%03d\n", i);
        string s;
        cin >> s;
        if (s == "unlocked")
            break;
    }
    return 0;
}