resit ersit rseit sreit esrit serit reist erist riest irest eirst ierst rsiet sriet riset irset siret isret esirt seirt eisrt iesrt siert isert resti ersti rseti sreti esrti serti retsi ertsi rtesi tresi etrsi tersi rstei srtei rtsei trsei strei tsrei estri setri etsri tesri steri tseri reits erits riets irets eirts ierts retis ertis rteis treis etris teris rites irtes rties tries itres tires eitrs ietrs etirs teirs iters tiers rsite srite riste irste sirte isrte rstie srtie rtsie trsie strie tsrie ritse irtse rtise trise itrse tirse sitre istre stire tsire itsre tisre esitr seitr eistr iestr sietr isetr estir setir etsir tesir steir tseir eitsr ietsr etisr teisr itesr tiesr siter ister stier tsier itser tiser
Note: these 'words' (valid or invalid) are all the permutations of the word resit. These words are obtained by scrambling the letters in resit.