In the Hawaiian language, Kona means leeward or dry side of the island, as opposed to ko‘olau which means windward or the wet side of the island. The Hawaiian alphabet has 13 letters, five vowels (long and short) and eight consonants, one of them being a glottal stop. Hawaiians had no written language prior to western contact, except for petroglyph symbols. The modern Hawaiian alphabet, ka pi'apa Hawaii, is based on the Latin script. Hawaiian words end only in vowels, and every consonant must be followed by a vowel. Due to extensive allophony, Hawaiian has more than 13 phones. Although vowel length is phonemic, long vowels are not always pronounced as such, even though under the rules for assigning stress in Hawaiian, a long vowel will always receive stress.