#include<iostream>
#include<string>
#include<algorithm>
#include<cmath>
#include<iomanip>
#include<cstring>
#include<map>
#include<vector>
#include<queue>
using namespace std;
typedef long long int ll;

int main(){

	string a = "000";
	
	while (1) {
		cout << a << endl;
		string b;
		cin >> b;
		if (b == "unlocked")break;
		a[2]++;
		if (a[2] > '9') {
			a[1]++; a[2] = '0';
		}
		if (a[1] > '9') {
			a[0]++; a[1] = '0';
		}
	}
  
  return 0;
}