using System;

public class Program

{

    public static void Main()

    {

        char[] array = {'h','e','l','l','o','d'};

        int left = 0;

        int right = array.Length-1;

        while(right-left >= 0)

        {

            char temp = array[right];

            array[right] = array[left];

            array[left] = temp;

            left++;

            right--;

        }

        String final = new String(array);

        Console.WriteLine(final);

    }

}