tacrv atcrv tcarv ctarv actrv catrv tarcv atrcv tracv rtacv artcv ratcv tcrav ctrav trcav rtcav crtav rctav acrtv cartv arctv ractv cratv rcatv tacvr atcvr tcavr ctavr actvr catvr tavcr atvcr tvacr vtacr avtcr vatcr tcvar ctvar tvcar vtcar cvtar vctar acvtr cavtr avctr vactr cvatr vcatr tarvc atrvc travc rtavc artvc ratvc tavrc atvrc tvarc vtarc avtrc vatrc trvac rtvac tvrac vtrac rvtac vrtac arvtc ravtc avrtc vartc rvatc vratc tcrva ctrva trcva rtcva crtva rctva tcvra ctvra tvcra vtcra cvtra vctra trvca rtvca tvrca vtrca rvtca vrtca crvta rcvta cvrta vcrta rvcta vrcta acrvt carvt arcvt racvt cravt rcavt acvrt cavrt avcrt vacrt cvart vcart arvct ravct avrct varct rvact vract crvat rcvat cvrat vcrat rvcat vrcat
Note: these 'words' (valid or invalid) are all the permutations of the word tacrv. These words are obtained by scrambling the letters in tacrv.