static void Main(string[] args)
{
Console.WriteLine("Suck some dick");
Human x = new Human();
Abiturient y = new Abiturient();
Student u = new Student();
Teacher r = new Teacher();
Bibl_user k = new Bibl_user();
x.SET_ALL();
x.ShowInfo();
y.SET_ALL();
y.ShowInfo();
u.SET_ALL();
u.ShowInfo();
r.SET_ALL();
r.ShowInfo();
k.SET_ALL();
k.ShowInfo();
}