If it’s a document: — meaning sections 200 to 210 of an F-18 aircraft Naval Flight Manual (NFM).
It looks like you’re asking to complete a string that resembles a part number, catalog code, or document identifier — possibly related to aerospace, military, or technical manuals. a1-f18ac-nfm-200 210
or a1-f18ac-nfm-200/210
The most likely completion would be a range or variant: If it’s a document: — meaning sections 200
Given the format: