public static void Main()
double x1 = double.Parse(Console.ReadLine());
double y1 = double.Parse(Console.ReadLine());
double x2 = double.Parse(Console.ReadLine());
double y2 = double.Parse(Console.ReadLine());
double x = double.Parse(Console.ReadLine());
double y = double.Parse(Console.ReadLine());
else if (y == y1 || y == y2)
Console.WriteLine("Border");
Console.WriteLine("Inside / Outside");