a version of Cyrillic, consisting of 33 letters, representing 38 phonemes; an apostrophe is also used. Ukrainian orthography is based on the phonemic principle, with one letter generally corresponding to one phoneme, although there are a number of exceptions. The orthography also has cases where the semantic, historical, and morphological principles are applied. The modern Ukrainian alphabet is the result of a number of proposed alphabetic reforms from the 19th and early 20th centuries, in Ukraine under the Russian Empire, in Austrian Galicia, and later in Soviet Ukraine. A unified Ukrainian alphabet (the Skrypnykivka, after Mykola Skrypnyk) was officially established at a 1927 international Orthographic Conference in Kharkiv, during the period of Ukrainization in Soviet Ukraine. But the policy was reversed in the 1930s, and the Soviet Ukrainian orthography diverged from that used by the diaspora. The Ukrainian letter ge ґ was banned in the Soviet Union from 1933 until the period of Glasnost in 1990. The letter щ represents two consonants . The combination of with some of the vowels is also represented by a single letter ( = я, = є, or = ї, = ю), while = йо and the rare regional = йи are written using two letters. These iotated vowel letters and a special soft sign change a preceding consonant from hard to soft. An apostrophe is used to indicate the hardness of the sound in the cases when normally the vowel would change the consonant to soft; in other words, it functions like the yer in the Russian alphabet. A consonant letter is doubled to indicate that the sound is doubled, or long. The phonemes and do not have dedicated letters in the alphabet and are rendered with the digraphs дз and дж, respectively. is equivalent to English ds in pods, is equivalent to j in jump. As in Russian, the acute accent may be used to denote vowel stress. Transliteration Orthography Spelling search, which began in the late 18th century with the emergence of modern literary language, led to the emergence of several spelling options. In particular, there was the spelling system of Oleksii Pavlovskyi, the spelling version of "Mermaid of the Dniester" (1837), Kulishivka (P. Kulish's spelling system), Drahomanivka (produced in Kyiv in the 1870s by a group of cultural figures led by linguist P. Zhytetskyi, which included and M. Drahomanov), Zhelekhivka (system of Yevhen Zhelekhovskyi (1886), enshrined in the Russian Grammar