#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define REP(i,n) FOR(i,0,n)
#define SZ(n) (int)(n).size()
#define ALL(n) (n).begin(), (n).end()
#define MOD 1000000007
using namespace std;
typedef long long LL;
typedef vector<int> VI;

int main() {
	char s[3];
	string re;
	REP(i, 10) {
		s[0] = i;
		REP(j, 10) {
			s[1] = j;
			REP(k, 10) {
				s[3] = k;
				printf("%c%c%c\n", s[0], s[1], s[2]);
				scanf("%s", re);
				if (re == "locked") continue;
				if (re == "unlocked") return 0;
			}
		}
	}
	return 0;
}