#include <cstdio>
#include <iostream>
#include <string>
#include <sstream>
#include <stack>
#include <algorithm>
#include <cmath>
#include <queue>
#include <map>
#include <set>
#include <cstdlib>
#include <bitset>
#include <tuple>
#include <assert.h>
#include <deque>
#include <bitset>
#include <iomanip>
#include <limits>
#include <chrono>
#include <random>
#include <array>
#include <unordered_map>
#include <functional>
#include <complex>

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

const long long MAX = 5100000;
const long long INF = 1LL << 60;
const long long mod = 1000000007LL;
//const long long mod = 998244353LL;

using namespace std;
typedef unsigned long long ull;
typedef long long ll;


int main()
{
	/*
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	*/
	string res = "0000000000";
	for (ll i = 0; i < 10; i++) {
		string tmp = res;
		ll mx = -1;
		char c;
		for (ll j = 0; j < 10; j++) {
			tmp[i] = (char)(j + '0');
			cout << tmp << endl;
			ll X;
			string a;
			cin >> X >> a;
			if (a == "unlocked") return 0;
			if (mx < X) {
				mx = X;
				c = (char)(j + '0');
			}
		}
		res[i] = c;
	}
	return 0;
}