using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(Program.Reverse("abcdefghijk"));

    }

    // Rules for this exercise:

    // Code the Reverse() 

    // We are not looking for an efficient algorithm.  We are looking for the cleverest solution with limited tools.

    //

​

    // Example, If str="abcdefghijk",then the return value will be "afedcbghijk"

    public static string Reverse(string str)

    {

        char[] array = new char[str.Length];

        int count = 0;

        for (int i = str.Length - 1; i >= 0; i--)

        {

            array[count++] = str[i];

        }

        return new string(array);

    }

}