#include <stdio.h>
#include <string.h>

int main() {
	char state[9];
	int i;

	for (i = 0; i <= 999; i++) {
		printf("%03d\n", i);
		fflush(stdout);
		scanf("%s", state);
		if (strcmp(state, "unlocked") == 0) return 0;
	}

	return 0;
}