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);