Write a function that takes in a word and splits the consonants one by one, but keeps the vowels in a cluster.
split("beautifully") ➞ ["b", "eau", "t", "i", "f", "u", "l", "l", "y"]
split("spoonful") ➞ ["s", "p", "oo", "n", "f", "u", "l"]
split("swimming") ➞ ["s", "w", "i", "m", "m", "i", "n", "g"]
a, e, i, o, u.