#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>
#include <string>

using namespace std;

int query(int x, int y) {
	cout << x << " " << y << endl;
	int ret;
	cin >> ret;
	return ret;
}

int main() {
	int a = query(0, 0);
	if (a == 0) {
		return 0;
	}

	int b = query(a, 0);
	if (b == 0) {
		return 0;
	}

	query(a - b / 2, b / 2);

	return 0;
}