franf rfanf farnf afrnf rafnf arfnf frnaf rfnaf fnraf nfraf rnfaf nrfaf fanrf afnrf fnarf nfarf anfrf nafrf ranff arnff rnaff nraff anrff narff frafn rfafn farfn afrfn raffn arffn frfan rffan ffran ffran rffan frfan fafrn affrn ffarn ffarn affrn fafrn raffn arffn rfafn frafn afrfn farfn frnfa rfnfa fnrfa nfrfa rnffa nrffa frfna rffna ffrna ffrna rffna frfna fnfra nffra ffnra ffnra nffra fnfra rnffa nrffa rfnfa frnfa nfrfa fnrfa fanfr afnfr fnafr nfafr anffr naffr fafnr affnr ffanr ffanr affnr fafnr fnfar nffar ffnar ffnar nffar fnfar anffr naffr afnfr fanfr nfafr fnafr ranff arnff rnaff nraff anrff narff rafnf arfnf rfanf franf afrnf farnf rnfaf nrfaf rfnaf frnaf nfraf fnraf anfrf nafrf afnrf fanrf nfarf fnarf
Note: these 'words' (valid or invalid) are all the permutations of the word franf. These words are obtained by scrambling the letters in franf.