The ogonek is functionally equivalent to the cedilla and comma diacritic marks. It indicates vowels with diacritic marks derived from Arabic. A vowel combines with a consonant in their diacritic form. The following are examples where a consonant letter is used with or without a diacritic. Vowels come in two shapes&colon; independent and diacritic. Unicode also contains precomposed versions of most letter/diacritic combinations in normal use. Counting syllables with this diacritic, the script represents 1,164 syllables. The non-syllabic diacritic is used only when necessary. The period is the opposite of the non-syllabic diacritic&colon; it represents a syllable break. White Hat established his own orthography, one that is very diacritic heavy and impractical. For modification to "p" by means of a diacritic, see Supplementary consonants. They may be contrasted in print by doubling the IPA diacritic for nasalization&colon; vs . The symbol is often used, with a diacritic indicating an pronunciation. The Pashto alphabet consists of 45 letters and 4 diacritic marks. The pronunciation of the following letters can also be modified with the geresh diacritic.