static void Main(string[] args)
{
E e = new E();
IA a = e;
a.ia();
e.ve1();
e.ve2();
e.e3();
F f = new F();
a = f;
IB b = f;
IC c = f;
ID d = f;
a.ia();
b.ib();
c.ic();
d.id1();
d.id2();
f.ve1();
f.ve2();
f.vf();
System.Environment.Exit(0);
}
