Since Dyirbal has fewer lexemes, a morpheme "-rri-" is used as an intransitive derivational suffix. Lexical class constructions describe combinatoric and other properties common to a group of lexemes. A lemma is a group of lexemes generated by inflectional morphology. Items in the lexicon are called lexemes, or lexical items, or word forms. Languages may mark perfective aspect with morphology, syntactic construction, lexemes/particles, or other means. Another is the division of lexemes into distinct inflectional classes. This correlates phonemes (units of sound) to lexemes (units of meaning). These meanings represent at least three etymologically separate lexemes, but share the one form, fluke. However, all the Hungarian lexemes collected from technical texts, dialects etc. In linguistics, a lexicon is a language's inventory of lexemes. Regular expressions compactly represent patterns that the characters in lexemes might follow. Some lexemes have several stems but one lemma. Postpositions and pronouns are closed classes with a small number of lexemes. However, numbers that are part of lexemes are typically written in kanji. This is also an example of syncretism manifested in lexemes.