Zapotec writing was logographic and presumably syllabic. Syllables are of the form (C)V (optional consonant, vowel) or N (a syllabic nasal). This is more consistent with the syllabic consonant description of these syllables. The system consists of a combination of logophonetic, consonantal alphabetic, and syllabic signs. Most logographic systems have a strong syllabic component. They are characterised by agglutinativity and syllabic consonants. Coptic uses to indicate syllabic consonants, for example . The system is founded upon accent, alliteration, quantity of vowels, and patterns of syllabic accentuation. The script is a mix between a logographic and a syllabic system. The script is syllabic, not alphabetic. This includes most syllabic and other non-alphabetic scripts. Southern Ryukyuan stands out in having a number of syllabic consonants. For development of the laryngeals and syllabic consonants, see the vowels table below. All three types may be augmented with syllabic glyphs. Then only feminine rhymes were allowed in syllabic verse system.