From Wiktionary, the free dictionary
о́соби • (ósobi) f anim or f anim pl
- inflection of о́собь (ósobʹ):
- genitive/dative/prepositional singular
- nominative plural
осо́би • (osóby) f pers or f pers pl
- inflection of осо́ба (osóba):
- genitive singular
- nominative/vocative plural