fains afins fians ifans aifns iafns fanis afnis fnais nfais anfis nafis finas ifnas fnias nfias infas nifas ainfs ianfs anifs naifs inafs niafs faisn afisn fiasn ifasn aifsn iafsn fasin afsin fsain sfain asfin safin fisan ifsan fsian sfian isfan sifan aisfn iasfn asifn saifn isafn siafn fansi afnsi fnasi nfasi anfsi nafsi fasni afsni fsani sfani asfni safni fnsai nfsai fsnai sfnai nsfai snfai ansfi nasfi asnfi sanfi nsafi snafi finsa ifnsa fnisa nfisa infsa nifsa fisna ifsna fsina sfina isfna sifna fnsia nfsia fsnia sfnia nsfia snfia insfa nisfa isnfa sinfa nsifa snifa ainsf iansf anisf naisf inasf niasf aisnf iasnf asinf sainf isanf sianf ansif nasif asnif sanif nsaif snaif insaf nisaf isnaf sinaf nsiaf sniaf
Note: these 'words' (valid or invalid) are all the permutations of the word fains. These words are obtained by scrambling the letters in fains.