#include <iostream>

using namespace std;

int main()
{

    int altitudine;

    for (int i = 0; i <= 15; i++)
    {
        for (int j = 0; j <= 15; j++)
        {
            cout << j << " " << i << endl;
            cin >> altitudine;
            if (altitudine == 0)
                return 0;
            cout.flush();
        }
    }


    return 0;
}