Many languages, including English, French, Spanish, and German use Latin characters (a-z). Hawaiian, as well, uses these characters. However, only a small subset of these characters are used in the Hawaiian alphabet - the five vowels: 'a', 'e', 'i', 'o', 'u', and seven consonants: 'h', 'k', 'l', 'm', 'n', 'p', 'w'. Given a sentence of words, you are to determine which could possibly be Hawaiian words. Anything which contains a letter not in the Hawaiian alphabet cannot be Hawaiian; every other word can be.
A word is defined as a contiguous sequence of letters. You will be given a sentence of words. You must tokenize them using a space (' ') as a delimiter, remove the words which cannot be Hawaiian, and return the rest in a String, in the order in which they occur in the sentence, in the same case in which they appear in the sentence.