FEhU (http://www.lojban.org/en/publications/reference_grammar/chapter9.html)

Elidable terminator for FIhO. Indicates the end of an ad hoc modal tag: the tagged
sumti immediately follows.

mi viska do fi'o kanla [fe'u] le zunle I see you [modal] eye: the left-thing I
see you with the left eye.

