A script to expand acronyms in text to their phonetic equivalents

phonetic.js

// phonetic.js
// A script to expand acronyms in text to their phonetic equivalents
var defaultInput = "I am the illest MC that you ever SAW";
var sounds = {
	A: "ay",
	B: "bee",
	C: "see",
	D: "dee",
	E: "ee",
	F: "eff",
	G: "jee",
	H: "aych",
	I: "I",
	J: "jay",
	K: "kay",
	L: "el",
	M: "em",
	N: "en",
	O: "O",
	P: "pee",
	Q: "cue",
	R: "ar",
	S: "ess",
	T: "tee",
	U: "you",
	V: "vee",
	W: "double you",
	X: "ex",
	Y: "why",
	Z: "zee"
};
var input = process.argv.slice(2).join(" ") || defaultInput;
var expanded;

expanded = input.replace(/\b[A-Z]{2,}\b/g, function(letters) {
	return letters.split("").map(function(letter) {
		return sounds[letter];
	}).join(" ");
});

console.log(expanded);