#include <iostream>
#include <fstream>
#include <vector>
#include <cstring>
#include <string>
#include <algorithm>
#include <iomanip>
using namespace std;
template<typename T> void setmin(T& a, T b) { a = min(a, b); }
template<typename T> void setmax(T& a, T b) { a = max(a, b); }

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

	string ans = "0000000000", res;
	int pn;

	cout << ans << endl;
	cout.flush();
	cin >> pn >> res;
	if(res == "unlocked") return 0;

	for(int i = 0; i < 10; i++) {
		int n, maxj, maxn = -1;
		for(int j = 0; j < 10; j++) {
			ans[i] = '0' + j;
			cout << ans << endl;
			cout.flush();
			cin >> n >> res;
			if(res == "unlocked") return 0;
			if(maxn == -1 || maxn < n) {
				maxj = j;
				maxn = n;
			}
		}
		ans[i] = '0' + maxj;
	}
}