tndor ntdor tdnor dtnor ndtor dntor tnodr ntodr tondr otndr notdr ontdr tdonr dtonr todnr otdnr dotnr odtnr ndotr dnotr nodtr ondtr dontr odntr tndro ntdro tdnro dtnro ndtro dntro tnrdo ntrdo trndo rtndo nrtdo rntdo tdrno dtrno trdno rtdno drtno rdtno ndrto dnrto nrdto rndto drnto rdnto tnord ntord tonrd otnrd notrd ontrd tnrod ntrod trnod rtnod nrtod rntod tornd otrnd trond rtond ortnd rotnd nortd onrtd nrotd rnotd orntd rontd tdorn dtorn todrn otdrn dotrn odtrn tdron dtron trdon rtdon drton rdton tordn otrdn trodn rtodn ortdn rotdn dortn odrtn drotn rdotn ordtn rodtn ndort dnort nodrt ondrt donrt odnrt ndrot dnrot nrdot rndot drnot rdnot nordt onrdt nrodt rnodt orndt rondt dornt odrnt dront rdont ordnt rodnt
Note: these 'words' (valid or invalid) are all the permutations of the word tndor. These words are obtained by scrambling the letters in tndor.