bints ibnts bnits nbits inbts nibts bitns ibtns btins tbins itbns tibns bntis nbtis btnis tbnis ntbis tnbis intbs nitbs itnbs tinbs ntibs tnibs binst ibnst bnist nbist inbst nibst bisnt ibsnt bsint sbint isbnt sibnt bnsit nbsit bsnit sbnit nsbit snbit insbt nisbt isnbt sinbt nsibt snibt bitsn ibtsn btisn tbisn itbsn tibsn bistn ibstn bsitn sbitn isbtn sibtn btsin tbsin bstin sbtin tsbin stbin itsbn tisbn istbn sitbn tsibn stibn bntsi nbtsi btnsi tbnsi ntbsi tnbsi bnsti nbsti bsnti sbnti nsbti snbti btsni tbsni bstni sbtni tsbni stbni ntsbi tnsbi nstbi sntbi tsnbi stnbi intsb nitsb itnsb tinsb ntisb tnisb instb nistb isntb sintb nsitb snitb itsnb tisnb istnb sitnb tsinb stinb ntsib tnsib nstib sntib tsnib stnib
Note: these 'words' (valid or invalid) are all the permutations of the word bints. These words are obtained by scrambling the letters in bints.