The Hawaiian alphabet contains 5 vowels and 8 consonants including the 'okina glottal stop. The 'okina and kahakō diacritical marks are important as they can drastically change a word's meaning. Omitting or incorrectly placing these marks in a word may alter its intended meaning. Proper spelling of Hawaiian words follows four rules including having at least one vowel and ending in a vowel, avoiding consonant clusters, and only using kahakō over vowels.