using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        // Get Full Name

        string name = "";

        while (!Regex.IsMatch(name, @"\b[a-zA-Z]{2,15}\s[a-zA-Z]{2,15}\b"))

        {

            Console.Write("Enter your name for the card (Firstname Lastname): ");

            name = Console.ReadLine();

        }

        // Get Credit Card Number

        string card = "";

        while (!Regex.IsMatch(card, "^[0-9]{12,19}$"))

        {

            Console.Write("Enter your credit card number: ");

            card = Console.ReadLine();

        }

        Console.WriteLine("Thank-you for ordering. ");

    }

}