darns adrns drans rdans ardns radns danrs adnrs dnars ndars andrs nadrs drnas rdnas dnras ndras rndas nrdas arnds rands anrds nards rnads nrads darsn adrsn drasn rdasn ardsn radsn dasrn adsrn dsarn sdarn asdrn sadrn drsan rdsan dsran sdran rsdan srdan arsdn rasdn asrdn sardn rsadn sradn dansr adnsr dnasr ndasr andsr nadsr dasnr adsnr dsanr sdanr asdnr sadnr dnsar ndsar dsnar sdnar nsdar sndar ansdr nasdr asndr sandr nsadr snadr drnsa rdnsa dnrsa ndrsa rndsa nrdsa drsna rdsna dsrna sdrna rsdna srdna dnsra ndsra dsnra sdnra nsdra sndra rnsda nrsda rsnda srnda nsrda snrda arnsd ransd anrsd narsd rnasd nrasd arsnd rasnd asrnd sarnd rsand srand ansrd nasrd asnrd sanrd nsard snard rnsad nrsad rsnad srnad nsrad snrad
Note: these 'words' (valid or invalid) are all the permutations of the word darns. These words are obtained by scrambling the letters in darns.