cbtmo bctmo ctbmo tcbmo btcmo tbcmo cbmto bcmto cmbto mcbto bmcto mbcto ctmbo tcmbo cmtbo mctbo tmcbo mtcbo btmco tbmco bmtco mbtco tmbco mtbco cbtom bctom ctbom tcbom btcom tbcom cbotm bcotm cobtm ocbtm boctm obctm ctobm tcobm cotbm octbm tocbm otcbm btocm tbocm botcm obtcm tobcm otbcm cbmot bcmot cmbot mcbot bmcot mbcot cbomt bcomt cobmt ocbmt bocmt obcmt cmobt mcobt combt ocmbt mocbt omcbt bmoct mboct bomct obmct mobct ombct ctmob tcmob cmtob mctob tmcob mtcob ctomb tcomb cotmb octmb tocmb otcmb cmotb mcotb comtb ocmtb moctb omctb tmocb mtocb tomcb otmcb motcb omtcb btmoc tbmoc bmtoc mbtoc tmboc mtboc btomc tbomc botmc obtmc tobmc otbmc bmotc mbotc bomtc obmtc mobtc ombtc tmobc mtobc tombc otmbc motbc omtbc
Note: these 'words' (valid or invalid) are all the permutations of the word cbtmo. These words are obtained by scrambling the letters in cbtmo.