prawn rpawn parwn aprwn rapwn arpwn prwan rpwan pwran wpran rwpan wrpan pawrn apwrn pwarn wparn awprn waprn rawpn arwpn rwapn wrapn awrpn warpn pranw rpanw parnw aprnw rapnw arpnw prnaw rpnaw pnraw npraw rnpaw nrpaw panrw apnrw pnarw nparw anprw naprw ranpw arnpw rnapw nrapw anrpw narpw prwna rpwna pwrna wprna rwpna wrpna prnwa rpnwa pnrwa nprwa rnpwa nrpwa pwnra wpnra pnwra npwra wnpra nwpra rwnpa wrnpa rnwpa nrwpa wnrpa nwrpa pawnr apwnr pwanr wpanr awpnr wapnr panwr apnwr pnawr npawr anpwr napwr pwnar wpnar pnwar npwar wnpar nwpar awnpr wanpr anwpr nawpr wnapr nwapr rawnp arwnp rwanp wranp awrnp warnp ranwp arnwp rnawp nrawp anrwp narwp rwnap wrnap rnwap nrwap wnrap nwrap awnrp wanrp anwrp nawrp wnarp nwarp
Note: these 'words' (valid or invalid) are all the permutations of the word prawn. These words are obtained by scrambling the letters in prawn.