static void Main(string[] args)
{
Scanner s = new Scanner()
{
SerialNumber = 2445
};
s.processDoc("My email: ");
Console.WriteLine(s.scan());
Printer p = new Printer()
{
SerialNumber = 5773
};
p.processDoc("My letter");
p.print("My letter");
ComboDevice c = new ComboDevice()
{
SerialNumber = 6366
};
c.processDoc("My dissertation");
c.print("My dissertation");
Console.WriteLine(c.scan());
}