JAVA SCRIPT PLEASE
	You are given a recursive function, `printLettersBetween()`, that takes
	a start and end letter and prints all the letters between them in order.
	If the start letter comes before the end letter in the alphabet, the letters
	should print out in alphabetical order. Otherwise, it should print in reverse
	alphabetical order. You are given an array of letters in the aplphabet to work
	with for this problem.
	The code is almost working but unfortunately, there are a few bugs. Use
	the debugging skills you've been practicing and the VSCode debugger to
	identify and solve the bugs.
	Examples:
	const alphabet = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];
	printLettersBetween(alphabet, "a", "c");
	// a
	// b
	// c