frise rfise firse ifrse rifse irfse frsie rfsie fsrie sfrie rsfie srfie fisre ifsre fsire sfire isfre sifre risfe irsfe rsife srife isrfe sirfe fries rfies fires ifres rifes irfes freis rfeis feris efris refis erfis fiers ifers feirs efirs iefrs eifrs riefs irefs reifs erifs ierfs eirfs frsei rfsei fsrei sfrei rsfei srfei fresi rfesi fersi efrsi refsi erfsi fseri sferi fesri efsri sefri esfri rsefi srefi resfi ersfi serfi esrfi fiser ifser fsier sfier isfer sifer fiesr ifesr feisr efisr iefsr eifsr fseir sfeir fesir efsir sefir esfir isefr siefr iesfr eisfr seifr esifr risef irsef rsief srief isref siref riesf iresf reisf erisf iersf eirsf rseif sreif resif ersif serif esrif iserf sierf iesrf eisrf seirf esirf
Note: these 'words' (valid or invalid) are all the permutations of the word frise. These words are obtained by scrambling the letters in frise.