Prefixes are not included (e.g., 00 prefixes an international MSISDN when dialing from Sweden). Verbs can also have prepronominal prefixes, reflexive prefixes, and derivative suffixes. Some accents are added by prefixes and suffixes. The Blackfoot verbal template contains a stem with several prefixes and suffixes. It features suffixes, prefixes, and infixes. This basic system was supplemented by further symbols representing common prefixes and suffixes. This section consolidates the common contemporary familial prefixes and suffixes; some usages may be regional. The verb is composed of a root, prefixes, and suffixes. Words containing non-technical numerical prefixes are usually not hyphenated. Several common-use numerical prefixes denote vulgar fractions. Systematic names and words comprising SI prefixes and binary prefixes are not hyphenated, by definition. The plosives undergo lenition after certain prefixes and prepositions. Mixtures of decimal prefixes and binary sector sizes require care to properly calculate total capacity. Those prefixed with the Brittonic prefixes "Aber-", "Lhan-", or "Pit-" (=? Numerous other cases of multiple numeral prefixes exist.