public static void Main()
Console.WriteLine("enter a number: ");
string num1 = Console.ReadLine();
Console.WriteLine( num1 + num1 + num1 );
Console.WriteLine( num1 + " " + num1);
Console.WriteLine( num1 + " " + num1);
Console.WriteLine( num1 + " " + num1);
Console.WriteLine( num1 + num1 + num1 );