#include "bits/stdc++.h"

using namespace std;

using ll = long long int;
using ld = long double;

using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vvvl = vector<vvl>;
using vd = vector<double>;
using vvd = vector<vd>;
using vb = vector<bool>;
using vvb = vector<vb>;
using vs = vector<string>;

const int INF = (1 << 30) - 1;
const ll INF64 = ((ll)1 << 62) - 1;
const double PI = 3.1415926535897932384626433832795;

const int dx[] = { -1, 0, 1, 0 };
const int dy[] = { 0, 1, 0, -1 };

int gcd(int x, int y) { return y ? gcd(y, x % y) : x; }
ll gcd(ll x, ll y) { return y ? gcd(y, x % y) : x; }
int lcm(int x, int y) { return x / gcd(x, y) * y; }
ll lcm(ll x, ll y) { return x / gcd(x, y) * y; }

int query(string s) {
	cout << s << endl;

	string state;
	int x;
	cin >> x >> state;

	if (state == "unlocked") {
		exit(0);
	}

	return x;
}

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

	string s = "0000000000";

	int ok = max(0, query(s));
	while (true) {
		for (char c = '0'; c <= '9'; c++) {
			for (int i = 0; i <= 9; i++) {
				string test = s;
				test[i] = c;

				int x = query(test);
				if (ok < x) {
					s[i] = test[i];
					break;
				}
			}
		}
	}
	return 0;
}