dints idnts dnits ndits indts nidts ditns idtns dtins tdins itdns tidns dntis ndtis dtnis tdnis ntdis tndis intds nitds itnds tinds ntids tnids dinst idnst dnist ndist indst nidst disnt idsnt dsint sdint isdnt sidnt dnsit ndsit dsnit sdnit nsdit sndit insdt nisdt isndt sindt nsidt snidt ditsn idtsn dtisn tdisn itdsn tidsn distn idstn dsitn sditn isdtn sidtn dtsin tdsin dstin sdtin tsdin stdin itsdn tisdn istdn sitdn tsidn stidn dntsi ndtsi dtnsi tdnsi ntdsi tndsi dnsti ndsti dsnti sdnti nsdti sndti dtsni tdsni dstni sdtni tsdni stdni ntsdi tnsdi nstdi sntdi tsndi stndi intsd nitsd itnsd tinsd ntisd tnisd instd nistd isntd sintd nsitd snitd itsnd tisnd istnd sitnd tsind stind ntsid tnsid nstid sntid tsnid stnid
Note: these 'words' (valid or invalid) are all the permutations of the word dints. These words are obtained by scrambling the letters in dints.