public static void solve2()
{
int N = 100;
Console.WriteLine("Print two sets");
SimpleSet a1 = new SimpleSet(N);
SimpleSet b1 = new SimpleSet(N);
Bitset a2 = new Bitset(N);
Bitset b2 = new Bitset(N);
string st = Console.ReadLine();
a1.Build(st);
a2.Build(st);
st = Console.ReadLine();
b1.Build(st);
b2.Build(st);
var c1 = a1 + b1;
c1.Print();
var d1 = a1 * b1;
d1.Print();
var c2 = a2 + b2;
c2.Print();
var d2 = a2 * b2;
d2.Print();
}