using System;

public class Program

{

    public static void Main()

    {

        var result = ("110", "Sunex660") switch {

                ("110", "Sunex660") => "110 Sunex660",

                ("110", _) => throw new ArgumentException("Invalid lens for 110") ,

                (_,_) => "empty",

        };

        Console.WriteLine(result);

    }

}