Pahawh is written left to right. Each syllable is written with two letters, an onset (la, an initial consonant or consonant cluster) and a rime (yu, a vowel, diphthong, or vowel plus final consonant). However, the order of these elements is rime-initial, the opposite of their spoken order. (That is, each syllable would seem to be written right to left, if it were transcribed literally into the Roman alphabet.) This is an indication that Shong conceived of the rimes as primary; Pahawh Hmong might therefore be thought of as a vowel-centered abugida. Tones and many onsets are distinguished by diacritics.