tmobu mtobu tombu otmbu motbu omtbu tmbou mtbou tbmou btmou mbtou bmtou tobmu otbmu tbomu btomu obtmu botmu mobtu ombtu mbotu bmotu obmtu bomtu tmoub mtoub tomub otmub motub omtub tmuob mtuob tumob utmob mutob umtob toumb otumb tuomb utomb outmb uotmb moutb omutb muotb umotb oumtb uomtb tmbuo mtbuo tbmuo btmuo mbtuo bmtuo tmubo mtubo tumbo utmbo mutbo umtbo tbumo btumo tubmo utbmo butmo ubtmo mbuto bmuto mubto umbto bumto ubmto tobum otbum tboum btoum obtum botum toubm otubm tuobm utobm outbm uotbm tbuom btuom tubom utbom butom ubtom obutm boutm oubtm uobtm buotm ubotm mobut ombut mbout bmout obmut bomut moubt omubt muobt umobt oumbt uombt mbuot bmuot mubot umbot bumot ubmot obumt boumt oubmt uobmt buomt ubomt
Note: these 'words' (valid or invalid) are all the permutations of the word tmobu. These words are obtained by scrambling the letters in tmobu.