## You're working on a secret team solving coded transmissions.

Your team is scrambling to decipher a recent message, worried it's a plot to break into a major European National Cake Vault. The message has been mostly deciphered, but all the words are backward! Your colleagues have handed off the last step to you.

### Write a function reverseWords() that takes a message as an array of characters and reverses the order of the words in place. ↴

>Why an array of characters instead of a string?
>The goal of this question is to practice manipulating strings in place. Since we're modifying the message, we need a mutable type like an array, instead of JavaScript's immutable strings.

For example:

  const message = [ 'c', 'a', 'k', 'e', ' ',
                'p', 'o', 'u', 'n', 'd', ' ',
                's', 't', 'e', 'a', 'l' ];

reverseWords(message);

console.log(message.join(''));
// Prints: 'steal pound cake'

When writing your function, assume the message contains only letters and spaces, and all words are separated by one space.

This can be solved with O(1) space and O(n) time - aim for that.