#include<stdio.h>
int main()
{
	int arr[100][100] = { 0 };
	int n = 0;
	scanf("%d", &n);
	int a, b, g, k = 0;
	for (int i = 0; i < n; i++)
	{
		scanf("%d%d%d%d", &a, &b, &g, &k);
		for (int h = a; h <= a + g; h++)
		{
			for (int z = b; z <= b + k; z++)
			{
				arr[h][z]++;
			}
		}
	}int x, y = 0;
	scanf("%d%d", &x, &y);
	if (arr[x][y] == 0)
		printf("%d", -1);
	else
		printf("%d", arr[x][y]);

	return 0;
}```