#include <bits/stdc++.h>

#define rep(i, ss, ee) for (int i = ss; i < ee; ++i)
using namespace std;

int N;
string s;

void solve() {
  rep(i, 1000, 2000) {
    cout << to_string(i).substr(1) << endl;
    cin >> s;
    if (s == "unlocked") return;
  }
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  solve();
}