thorn htorn tohrn othrn hotrn ohtrn thron htron trhon rthon hrton rhton torhn otrhn trohn rtohn orthn rothn hortn ohrtn hrotn rhotn orhtn rohtn thonr htonr tohnr othnr hotnr ohtnr thnor htnor tnhor nthor hntor nhtor tonhr otnhr tnohr ntohr onthr nothr hontr ohntr hnotr nhotr onhtr nohtr thrno htrno trhno rthno hrtno rhtno thnro htnro tnhro nthro hntro nhtro trnho rtnho tnrho ntrho rntho nrtho hrnto rhnto hnrto nhrto rnhto nrhto tornh otrnh tronh rtonh ortnh rotnh tonrh otnrh tnorh ntorh ontrh notrh trnoh rtnoh tnroh ntroh rntoh nrtoh ornth ronth onrth north rnoth nroth hornt ohrnt hront rhont orhnt rohnt honrt ohnrt hnort nhort onhrt nohrt hrnot rhnot hnrot nhrot rnhot nrhot ornht ronht onrht norht rnoht nroht
Note: these 'words' (valid or invalid) are all the permutations of the word thorn. These words are obtained by scrambling the letters in thorn.