#include <iostream>
#include <string.h>
using namespace std;

int query(int x, int y)
{
    int t;
    cout << x << ' ' << y << '\n';
    cout.flush();

    cin >> t;
    return t;
}

int main()
{
    int n = 200;
    string t;
    int line = 0;
    for(int i = 0 ; i < n; i++)
    {
        int a = query(i, 0);
        if(a == 0)
            return 0;
        if(a <= 0)
            line = i;
        if(a > 0)
            break;
    }
    for(int i = 0 ; i < n; i++)
    {
        int a = query(line, i);
        if(a == 0)
            return 0;
    }
    return 0;
}