static void Main(string[] args)
{
HashSet <Terrain> t1 = new HashSet <Terrain>()
{
new Forest(),
new Steppe()
};
HashSet <Terrain> t2 = new HashSet <Terrain>()
{
new Forest(),
new Water()
};
HashSet <Terrain> t3 = new HashSet <Terrain>()
{
new Water(),
new Steppe()
};
HashSet <Terrain> t4 = new HashSet <Terrain>()
{
new Forest(),
new Steppe(),
new Water()
};
List <Cage> cages = new List <Cage>()
{
new Cage(t1),
new Cage(t2),
new Cage(t3),
new Cage(t4)
};
Keeper keepkeep = new Keeper();
Console.WriteLine(keepkeep.AddAnimal(cages, new Boar()));
Console.In.ReadLine();
}