#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000


int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
	int locked = 10;
	int X[10];
	string S;
	int tmp = 0;
	while (true) {
		rep(i, locked - 1) cout << '0';
		cout << tmp;
		rep(i, S.length()) cout << S[i];
		cout << endl << flush;
		string T;
		cin >> X[tmp] >> T;
		if (T == "unlocked") return 0;
		tmp++;
		if (tmp == 1) continue;
		if (tmp == 2) {
			if (X[0] == X[1]) continue;
			else if (X[0] > X[1]) S = '0' + S;
			else S = '1' + S;
		}
		else if (tmp > 2) {
			if (X[0] == X[tmp - 1]) continue;
			else S = (char)('0' + tmp - 1) + S;
		}
		tmp = 0;
		locked--;

	}

    return 0;
}