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#include <cstdlib>
#include <iostream>
#include <vector>

using namespace std;

int main()
{
	int t, n, x, y;

	cin >> t;

	for (int i = 0;i < t; i++)
	{
		cin >> n;	
		for (int j = 0;j < n;j++)
		{
			cin >> x >> y;
		}
		cout << "NIE" << endl;
	}

	return 0;
}