public class Human
{
    private const int basehp = 20;

    public class Male : Human
    {
			basehp += 20%;
    }

    public class Female : Human
    {
				basehp -= 20%;
    }
}
public class NotHuman
{
    private const int basehp 222;

    public class Male : NotHuman
    {
				basehp += 20%;
    }

    public class Female : NotHuman
    {
				basehp -= 20%;
    }
}