using System;

public class Program

{

    public static void Main()

    {

        char[] input = new char[] {'a','p','p','l','e', ' ', 'm','a','n','g','o', ' ', 'd','o','g', ' ', 'c','a','t'};

        // expected output

        // {'c','a','t',' ','d','o','g',' ','m','a','n','g','o',' ','a','p','p','l','e'}

        ReverseWordSequence(input);

        Console.WriteLine();

        foreach(var c in input)

        {

            Console.Write(c);

        }

    }

    // expected output

    // {'c','a','t',' ','d','o','g',' ','m','a','n','g','o',' ','a','p','p','l','e'}

    static char[] ReverseWordSequence(char[] input)

    {

        // implementation here

    }

}