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