foern ofern feorn eforn oefrn eofrn foren ofren froen rfoen orfen rofen feron efron freon rfeon erfon refon oerfn eorfn orefn roefn erofn reofn foenr ofenr feonr efonr oefnr eofnr foner ofner fnoer nfoer onfer nofer fenor efnor fneor nfeor enfor nefor oenfr eonfr onefr noefr enofr neofr forne ofrne frone rfone orfne rofne fonre ofnre fnore nfore onfre nofre frnoe rfnoe fnroe nfroe rnfoe nrfoe ornfe ronfe onrfe norfe rnofe nrofe ferno efrno freno rfeno erfno refno fenro efnro fnero nfero enfro nefro frneo rfneo fnreo nfreo rnfeo nrfeo ernfo renfo enrfo nerfo rnefo nrefo oernf eornf orenf roenf eronf reonf oenrf eonrf onerf noerf enorf neorf ornef ronef onref noref rnoef nroef ernof renof enrof nerof rneof nreof
Note: these 'words' (valid or invalid) are all the permutations of the word foern. These words are obtained by scrambling the letters in foern.