Hawaiian alphabet not make it a letter of the alphabet. In publishing the Hawaiian Bible, they used the okina to distinguish ' ('my') from ' ('your'). It was not until 1864 that the okina became a recognized letter of the Hawaiian alphabet. As early as 1821, one of the missionaries, Hiram Bingham, was using macrons in making handwritten transcriptions of Hawaiian vowels. The macron, or "", was used to differentiate between short and long vowels. The current official Hawaiian alphabet consists of 12 letters: five vowels (A a, E e, I i, O o, U u) and seven consonants (H h, K
Regional accents of English pronunciation of "pearl" in some variants of Scottish English can sound like the entirely unrelated word "petal" to an American ear. For a summary of the differences between accents, see International Phonetic Alphabet chart for English dialects. English dialects differ greatly in their pronunciation of open vowels. In Received Pronunciation, there are four open back vowels, , but in General American there are only three, , and in most dialects of Canadian English only two, . In addition, which words have which vowel varies between dialects. Words like "bath" and "cloth" have the vowels in Received Pronunciation, but in General