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
Avestan alphabet alphabet, with explicit characters for vowels, and allowed for phonetic disambiguation of allophones. The alphabet included many characters ("a", "i", "k", "t", "p", "b", "m", "n", "r", "s", "z", "š", "x") from cursive Pahlavi, while some ("ā", "γ") are characters that only exist in the Psalter Pahlavi variant (in cursive Pahlavi "γ" and "k" have the same symbol). Some of the vowels, such as "ə" appear to derive from Greek minuscules. Avestan "o" is a special form of Pahlavi "l" that exists only in Aramaic signs. Some letters (e.g. "ŋ́", "ṇ", "ẏ", "v"), are free inventions. Avestan script, like Pahlavi