The first 35 characters are the consonant letters (including two obsolete). The symbols at U+17A3 and U+17A4 are deprecated (they were intended for use in Pali and Sanskrit transliteration, but are identical in appearance to the consonant , written alone or with the "a" vowel). These are followed by the 15 independent vowels (including one obsolete and one variant form). The code points U+17B4 and U+17B5 are invisible combining marks for inherent vowels, intended for use only in special applications. Next come the 16 dependent vowel signs and the 12 diacritics (excluding the "kbiĕh kraôm", which is identical in form to the "ŏ" dependent vowel); these are represented together with a dotted circle, but should be displayed appropriately in combination with a preceding Khmer letter.