int a = int.Parse(Console.ReadLine());
            int b = int.Parse(Console.ReadLine());
            int c = int.Parse(Console.ReadLine());

            if ((a != b && b != c && a != c))
                Console.WriteLine("different numbers");
            else
            {
                    if (a == b && b == c && a == c)
                        Console.WriteLine("all equal");
                    else
                    {
                    if ((a == b) || (a == c) || (b == c))
                        Console.WriteLine("only two are equal");
                    }
             }