using System;

​

namespace ConsoleApplication3

{

   public class Program

    {

​

        public static string ProgWords(string str)

        {

            var strArray = str.Split(' ');

            for (int i = 0; i < strArray.Length; i++)

            {

                switch (strArray[i].Trim().ToUpper())

                {

                    case "JAVASCRIPT":

                        return "JavaScript is not allowed";

                    case "MYSQL":

                        return "MySql is not allowed";

                    case "HTML":

                        return "Html is not allowed";

                    case "CSS":

                        return "CSS is not allowed";

                    default:

                        break;

                }

            }

            return "Clear nothing unallowed";

        }

​

        public static void Main(string[] args)

        {

            Console.WriteLine(ProgWords("I love javascript"));

          //  Console.ReadLine();

        }

    }

}

​

​