dumbs udmbs dmubs mdubs umdbs mudbs dubms udbms dbums bdums ubdms budms dmbus mdbus dbmus bdmus mbdus bmdus umbds mubds ubmds bumds mbuds bmuds dumsb udmsb dmusb mdusb umdsb mudsb dusmb udsmb dsumb sdumb usdmb sudmb dmsub mdsub dsmub sdmub msdub smdub umsdb musdb usmdb sumdb msudb smudb dubsm udbsm dbusm bdusm ubdsm budsm dusbm udsbm dsubm sdubm usdbm sudbm dbsum bdsum dsbum sdbum bsdum sbdum ubsdm busdm usbdm subdm bsudm sbudm dmbsu mdbsu dbmsu bdmsu mbdsu bmdsu dmsbu mdsbu dsmbu sdmbu msdbu smdbu dbsmu bdsmu dsbmu sdbmu bsdmu sbdmu mbsdu bmsdu msbdu smbdu bsmdu sbmdu umbsd mubsd ubmsd bumsd mbusd bmusd umsbd musbd usmbd sumbd msubd smubd ubsmd busmd usbmd submd bsumd sbumd mbsud bmsud msbud smbud bsmud sbmud
Note: these 'words' (valid or invalid) are all the permutations of the word dumbs. These words are obtained by scrambling the letters in dumbs.