History of the Greek alphabet retained the sound. A symbol based on the left-hand half ( ├ ) of the letter Η was therefore sometimes used to indicate the presence of where necessary, and its absence was indicated by a symbol based on the right half. During the classical period, ΕΙ came to be pronounced and ΟΥ came to be pronounced , Υ having meanwhile moved to . By about 200 BC, a system of diacritical marks was invented, representing the tone accents in use in Ancient Greek. This also helped to indicate the length of the vowels Α, Ι, and Υ in certain cases
Alphabet (for the Latin script), with 46. However, these scripts either count di- and tri-graphs as separate letters, as Spanish did with "ch" and "ll" until recently, or uses diacritics like Slovak "č". The Georgian alphabet ( "") is alphabetical writing system. It is the largest true alphabet where each letter is graphically independent with 33 letters. Original Georgian alphabet had 38 letters but 5 letters were removed in 19th century by Ilia Chavchavadze. The Georgian alphabet is much closer to Greek than the other Caucasian alphabets. The numeric value runs parallel to the Greek one, the consonants without a Greek