rears erars raers arers earrs aerrs reras erras rreas rreas erras reras rares arres rraes rraes arres rares earrs aerrs erars rears arers raers reasr erasr raesr aresr earsr aersr resar ersar rsear srear esrar serar raser arser rsaer sraer asrer sarer easrr aesrr esarr searr aserr saerr rersa errsa rresa rresa errsa rersa resra ersra rsera srera esrra serra rrsea rrsea rsrea srrea rsrea srrea ersra resra esrra serra rsera srera rarse arrse rrase rrase arrse rarse rasre arsre rsare srare asrre sarre rrsae rrsae rsrae srrae rsrae srrae arsre rasre asrre sarre rsare srare earsr aersr erasr reasr aresr raesr easrr aesrr esarr searr aserr saerr ersar resar esrar serar rsear srear arser raser asrer sarer rsaer sraer
Note: these 'words' (valid or invalid) are all the permutations of the word rears. These words are obtained by scrambling the letters in rears.