#include <iostream>
#include <algorithm>
#include <sstream>
#include <vector>

using namespace std;

int getres(const char *w) {
	printf("%s\n", w);
	fflush(stdout);
	char buff[1024];
	fgets(buff, 1024, stdin);
	return atoi(buff);
}

int main(int argc, char *argv[])
{
	char w[16] = {};
	while (true) {
		for (int i = 0; i < 10; ++i) {
			w[i] = '0' + (rand() * 10) / (RAND_MAX + 1);
		}
		if (getres(w) == 0) {
			break;
		}
	}
	for (int i = 0; i < 10; ++i) {
		for (int j = 0; j < 10; ++j) {
			w[i] = '0' + j;
			if (getres(w) == i + 1) {
				break;
			}
		}
	}
	return 0;
}