Central Kurdish ("Sorani") is mainly written using a modified Persian alphabet with 33 letters introduced by Sa'id Kaban Sedqi. Unlike the Persian alphabet, which is an abjad, Central Kurdish is almost a true alphabet in which vowels are mandatory, making the script easier to read. Central Kurdish does not have a complete representation of Kurmanji Kurdish sounds, as it lacks "i". Written Central Kurdish also relies on vowel and consonant context to differentiate between the phonemes u/w and î/y instead of using separate letters. It does show the two pharyngeal consonants, as well as a voiced velar fricative, used in Kurdish. Reformed Central Kurdish does have glyphs for the "i" [] and it is able to successfully differentiate between the consonant "w" from the short vowel "u" by representing "w" with a []. It is also able to successfully differentiate between the consonant "y" from the long vowel "î" by representing "î" with a [] and the long vowel "û" can be represented with a [] or [] instead of double .