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