#include<bits/stdc++.h>

using namespace std;

#define dbg(x) (cout<<#x<<" = "<<(x)<<'\n')

typedef long long int lld;
const int INF = (1LL << 30) - 1;
const lld LINF = (1LL << 62) - 1;

int N = 200;

bool baga(int x, int y) {
	if (x >= 0 && y >= 0 && x < N && y < N) {
		printf("%d %d\n", x, y);
		fflush(stdout);

		int val;

		scanf("%d", &val);

		if (val == 0)
			return 1;
	}

	return 0;
}

int main() {
	cin.sync_with_stdio(false);

	#ifndef ONLINE_JUDGE
	freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout);
	#endif

	int val;
	int lo = 0, hi = N - 1, mi;

	for (;;) {
		mi = (lo + hi) / 2;

		printf("%d %d\n", mi, mi);
		fflush(stdout);

		scanf("%d", &val);

		if (val == 0)
			break;

		if (val < 0)
			lo = mi + 1;
		else
			hi = mi - 1;
	}

	if (baga(mi - 1, mi)) return 0;
	if (baga(mi, mi - 1)) return 0;

	return 0;
}