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#include <iostream>
#include <string>

using namespace std;

int main()
{
	short zadania[102][3]; for (int x = 1; x < 102; x++) { for (int y = 0; y < 3; y++) { zadania[x][y] = 0; } }
	short amount;
	cin >> amount;

	for (int i = 0; i < amount; i++)
	{
		string napis;
		cin >> napis;

		switch (napis[napis.length() - 1])
		{
			case 'A':
			{
				zadania[stoi(napis)][0]++;
				break;
			}

			case 'B':
			{
				zadania[stoi(napis)][1]++;
				break;
			}

			case 'C':
			{
				zadania[stoi(napis)][2]++;
				break;
			}
		}
	}

	int i;
	for (i = 101; i >= 0; i--)
	{
		bool yes = false;

		for (int z = 0; z < 3; z++)
		{
			if (zadania[i][z] >= 2)
			{
				if (!yes && z != 0)
				{
					cout << "NIE";
					return 0;
				}

				yes = true;
			}

			else if (yes)
			{
				cout << "NIE";
				return 0;
			}
		}

		if (yes) break;
	}

	for (; i >= 1; i--)
	{
		bool yes = false;

		for (int z = 0; z < 3; z++)
		{
			if (zadania[i][z] >= 1)
			{
				if (!yes && z != 0)
				{
					cout << "NIE";
					return 0;
				}

				yes = true;
			}

			else if (yes)
			{
				cout << "NIE";
				return 0;
			}
		}
	}

	cout << "TAK";
}