using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("How many sides does your shape have?");

        //String sideNumberString = Console.ReadLine();

        //int sideNumber = int.Parse(sideNumberString);

        Random rndGenerator = new Random();

        for (int i = 0; i < 10; i++)

        {

            int sideNumber = rndGenerator.Next(3, 10);

            switch (sideNumber)

            {

                case 3:

                    Console.WriteLine("triangle");

                    break;

                case 4:

                    Console.WriteLine("square");

                    break;

                case 5:

                    Console.WriteLine("pentagon");

                    break;

                case 6:

                    Console.WriteLine("hexagon");

                    break;

                case 7:

                    Console.WriteLine("septagon");

                    break;

                case 8:

                    Console.WriteLine("octagon");

                    break;

                case 9:

                    Console.WriteLine("nonagon");

                    break;

                case 10:

                    Console.WriteLine("decagon");

                    break;

                default:

                    Console.WriteLine("invalid shape");

                    break;

            }

        }

    }

}