ructe urcte rcute crute ucrte curte rutce urtce rtuce truce utrce turce rctue crtue rtcue trcue ctrue tcrue uctre cutre utcre tucre cture tcure rucet urcet rcuet cruet ucret curet ruect urect reuct eruct uerct eurct rceut creut recut ercut cerut ecrut ucert cuert uecrt eucrt ceurt ecurt rutec urtec rtuec truec utrec turec ruetc uretc reutc erutc uertc eurtc rteuc treuc retuc ertuc teruc etruc uterc tuerc uetrc eutrc teurc eturc rcteu crteu rtceu trceu ctreu tcreu rcetu cretu rectu erctu certu ecrtu rtecu trecu retcu ertcu tercu etrcu cteru tceru cetru ectru tecru etcru ucter cuter utcer tucer ctuer tcuer ucetr cuetr uectr euctr ceutr ecutr utecr tuecr uetcr eutcr teucr etucr cteur tceur cetur ectur tecur etcur
Note: these 'words' (valid or invalid) are all the permutations of the word ructe. These words are obtained by scrambling the letters in ructe.