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#include <iostream>
#include <cmath>

using namespace std;

int main()
{
	int n;
	int X;
	int Y;
	int wynik = 0;
	int bufor = 0;
	bool bufor2 = 1;

	cin >> n;
	cin >> X;
	cin >> Y;

	int *kartka = new int[n];
	for (int i = 0; i < n; i++)
		kartka[i] = 0;

	int *** rant = new int **[n];
	for (int i = 0; i < n; i++)
	{
		rant[i] = new int *[2];

		for (int j = 0; j < 2; j++)
		{
			rant[i][j] = new int[2];

			for (int k = 0; k < 2; k++)
			{
				cin >> rant[i][j][k];
				rant[i][j][k]--;
			}
		}
	}

	bool ****mapa = new bool ***[n];
	for (int i = 0; i < n; i++)
	{
		mapa[i] = new bool **[4];

		for (int j = 0; j < 4; j++)
		{
			mapa[i][j] = new bool *[X];

			for (int k = 0; k < X; k++)
			{
				mapa[i][j][k] = new bool[Y];

				for (int l = 0; l < Y; l++)
				{
					mapa[i][j][k][l] = 0;

					if (j == 0)
					{
						if (rant[i][0][0] > rant[i][1][0])
						{
							if (rant[i][0][1] > rant[i][1][1])
							{
								if (k <= rant[i][0][0] && k > rant[i][1][0] && l <= rant[i][0][1] && l > rant[i][1][1])
									mapa[i][j][k][l] = 1;
							}
							else
							{
								if (k <= rant[i][0][0] && k > rant[i][1][0] && l <= rant[i][1][1] && l > rant[i][0][1])
									mapa[i][j][k][l] = 1;
							}
						}
						else
						{
							if (rant[i][0][1] > rant[i][1][1])
							{
								if (k <= rant[i][1][0] && k > rant[i][0][0] && l <= rant[i][0][1] && l > rant[i][1][1])
									mapa[i][j][k][l] = 1;
							}
							else
							{
								if (k <= rant[i][1][0] && k > rant[i][0][0] && l <= rant[i][1][1] && l > rant[i][0][1])
									mapa[i][j][k][l] = 1;
							}
						}
					}
					else if (j == 1)
					{
						if (rant[i][0][0] > rant[i][1][0])
						{
							if (rant[i][0][1] > rant[i][1][1])
							{
								if (k <= rant[i][0][0] && k > rant[i][1][0] && (l > rant[i][0][1] || l <= rant[i][1][1]))
									mapa[i][j][k][l] = 1;
							}
							else
							{
								if (k <= rant[i][0][0] && k > rant[i][1][0] && (l > rant[i][1][1] || l <= rant[i][0][1]))
									mapa[i][j][k][l] = 1;
							}
						}
						else
						{
							if (rant[i][0][1] > rant[i][1][1])
							{
								if (k <= rant[i][1][0] && k > rant[i][0][0] && (l > rant[i][0][1] || l <= rant[i][1][1]))
									mapa[i][j][k][l] = 1;
							}
							else
							{
								if (k <= rant[i][1][0] && k > rant[i][0][0] && (l > rant[i][1][1] || l <= rant[i][0][1]))
									mapa[i][j][k][l] = 1;
							}
						}
					}
					else if (j == 2)
					{
						if (rant[i][0][0] > rant[i][1][0])
						{
							if (rant[i][0][1] > rant[i][1][1])
							{
								if ((k > rant[i][0][0] || k <= rant[i][1][0]) && l <= rant[i][0][1] && l > rant[i][1][1])
									mapa[i][j][k][l] = 1;
							}
							else
							{
								if ((k > rant[i][0][0] || k <= rant[i][1][0]) && l <= rant[i][1][1] && l > rant[i][0][1])
									mapa[i][j][k][l] = 1;
							}
						}
						else
						{
							if (rant[i][0][1] > rant[i][1][1])
							{
								if ((k > rant[i][1][0] || k <= rant[i][0][0]) && l <= rant[i][0][1] && l > rant[i][1][1])
									mapa[i][j][k][l] = 1;
							}
							else
							{
								if ((k > rant[i][1][0] || k <= rant[i][0][0]) && l <= rant[i][1][1] && l > rant[i][0][1])
									mapa[i][j][k][l] = 1;
							}
						}
					}
					else
					{
						if (rant[i][0][0] > rant[i][1][0])
						{
							if (rant[i][0][1] > rant[i][1][1])
							{
								if ((k > rant[i][0][0] && (l > rant[i][0][1] || l <= rant[i][1][1])) || (k <= rant[i][1][0] && (l > rant[i][0][1] || l <= rant[i][1][1])))
									mapa[i][j][k][l] = 1;
							}
							else
							{
								if ((k > rant[i][0][0] && (l > rant[i][1][1] || l <= rant[i][0][1])) || (k <= rant[i][1][0] && (l > rant[i][1][1] || l <= rant[i][0][1])))
									mapa[i][j][k][l] = 1;
							}
						}
						else
						{
							if (rant[i][0][1] > rant[i][1][1])
							{
								if ((k > rant[i][1][0] && (l > rant[i][0][1] || l <= rant[i][1][1])) || (k <= rant[i][0][0] && (l > rant[i][0][1] || l <= rant[i][1][1])))
									mapa[i][j][k][l] = 1;
							}
							else
							{
								if ((k > rant[i][1][0] && (l > rant[i][1][1] || l <= rant[i][0][1])) || (k <= rant[i][0][0] && (l > rant[i][1][1] || l <= rant[i][0][1])))
									mapa[i][j][k][l] = 1;
							}
						}
					}
				}
			}
		}
	}

	for (int i = 0; i < pow(4, n); i++)
	{
		for (int j = 0; j < X; j++)
		{
			for (int k = 0; k < Y; k++)
			{
				for (int l = 0; l < n; l++)
				{
					if (mapa[l][kartka[l]][j][k] != 1)
					{
						bufor2 = 0;
						break;
					}
				}
				if (bufor2 == 1)
					bufor++;
				bufor2 = 1;
			}
		}
		if (bufor > wynik)
			wynik = bufor;
		bufor = 0;
		kartka[n - 1]++;

		for (int j = n - 1; j >= 0; j--)
		{
			if (kartka[j] == 4)
			{
				kartka[j - 1]++;
				kartka[j] = 0;
			}
		}
	}

	cout << wynik;

	delete[] kartka;

	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < 4; j++)
		{
			for (int k = 0; k < X; k++)
				delete[] mapa[i][j][k];

			delete[] mapa[i][j];
		}
		delete[] mapa[i];
	}
	delete[] mapa;

	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < 2; j++)
			delete[] rant[i][j];

		delete[] rant[i];
	}
	delete[] rant;

	return 0;
}