-vac aaaa aaac aaar aaav aaca aacc aaco aacr aact aacu aacv aaoo aara aarc aaro aart aaru aata aatc aatt aava ac-t acaa acac acar acat acca accc acco acct accu acoa acor acot acou acr- acra acrc acro acrr acrv acta actc acto actt actu actv acu- acuo acur acut acvv aoca aora aort aotc aout arac arar arat arau arc- arca arco arct aroa aroo aror arr- arra arrc arro arrr arrt arru arta artc arto artr artv arua arut arva arvo at-t ataa atac atar atat atca atcc atco atcr atoc ator atot atra atrc atro atru atta atto attr attu atua atuc atur auaa auca auct aur- aura auro aut- auto avao avar avat avcc avco avor avot avou avra avro avur avva avvo caaa caac caat cac- caca cacc caco cacr caor cara carc caro carr cart cat- cata catc cato catt catu catv cauc cauo caut cava cavo cavu ccaa ccac ccar ccat ccca cccc cccu cccv ccoc ccra ccrc ccrt cctc cctt cctv ccuc ccut ccvo coat coca coco coct cocu coot cor- cora corc coro corr cort cota cotc coto cott cotu coua cour cout cova covo crac crar crat crau crca crcc crcr croc croo cror crot crrt crtc crtv crut ctca ctor ctot ctrc ctta ctvo ctvt cuau cuca cucc cura curo curr curt cut- cuta cutc cuto cutt cutv cvac cvar cvca cvcc cvra cvrr oaau oara ocac ocat occa occc occt ocra ocro ocrr oct- octa octo ocur ooaa oocr oooo oora oort orac orao orar orat orav orca orco oro- oror orot orra orro orta ortc orto orvr otac otar oto- otoo otor otov otra otro otta otto ottu otur ouac ouat oucc our- oura ouro ourt out- outa outo ouu- ovar ovo- ovoo ovot ovra raat rac- raca racc raco ract racu racv raoc rara raro rata rato ratt ratu raua rauc raut rava rcac rccc rctc rctv rcuv rcvr roar roat roca rocc roco roor root rora rorc roro rort roru rota rotc roto rotr rott roua rout rova rovo rrat rrrr rtca rtcc rtva ruca ruct rura rurc ruro ruru ruta ruto rutt rutu ruvu rv-c rvca taa- taar taat taca tacc taco tact tacv taoa taor taou tara tarc taro tarr tart taru tata tato tatr tatt tatu tatv taua tauc taur taut tava tavo tcca tccc tccu tcov tctc toat toau toca toco tooa toor toot tora torc toro torr tort toru torv tota totc toto totr tott tour tout touv tova tovo traa trac trao trat trau trav trca trcc troa troc troo trot trou trra trtc trtr truc trut truu tttt tuao tuar tuat tuca tucc tuco tuor tura turc turo turr turt turu tuta tuto tutt tutu tuuo tuva tvac tvro tvrr tvtv uaca uaoc uarc uart uaru uata uatu uatv uaua ucar ucat ucav ucca ucrc uctv ucua ucut uocc uor- uovo urac urao urat urau urca uro- uroa uroo urra urur urut urva utac utau utor utto uttu uuoc uuta uuuu uv-a uv-c uvaa uvac uvat uvvu vaar vaat vaca vaco vara varr vart varu vata vato vatt vatu vaut vava vcat voar voat voca vooc voor voot vor- vora voro vort voru vota voto vour vout vrac vrav vroc vrot vrto vtac vuca vuco vurt vutv vvvv