A system of written symbols used to represent the syllables of the words of a language. Writing systems that use syllabaries include modern Japanese, Cherokee, the ancient Cretan scripts (Linear A, Linear B), and various Indic and cuneiform writing systems. Some syllabaries have separate symbols for each possible syllable that may occur in the language; others use a system of consonant symbols that include an inherent vowel. Most languages would require about 80 symbols to cover all syllables in use. The unit of a syllabary is sometimes called syllabogram, which may be of these types: vowel, consonant-vowel, vowel-consonant, consonant-vowel-consonant, or consonant-vowel-consonant-vowel.