-vac aaaa aaac aaar aaav aaca aacc aacr aact aacv aara aarc aart aata aatc aatt aava ac-t acaa acac acar acat acca accc acct acr- acra acrc acrr acrv acta actc actt actv acvv arac arar arat arc- arca arct arr- arra arrc arrr arrt arta artc artr artv arva at-t ataa atac atar atat atca atcc atcr atra atrc atta attr avar avat avcc avra avva caaa caac caat cac- caca cacc cacr cara carc carr cart cat- cata catc catt catv cava ccaa ccac ccar ccat ccca cccc cccv ccra ccrc ccrt cctc cctt cctv crac crar crat crca crcc crcr crrt crtc crtv ctca ctrc ctta ctvt cvac cvar cvca cvcc cvra cvrr raat rac- raca racc ract racv rara rata ratt rava rcac rccc rctc rctv rcvr rrat rrrr rtca rtcc rtva rv-c rvca taa- taar taat taca tacc tact tacv tara tarc tarr tart tata tatr tatt tatv tava tcca tccc tctc traa trac trat trav trca trcc trra trtc trtr tttt tvac tvrr tvtv vaar vaat vaca vara varr vart vata vatt vava vcat vrac vrav vtac vvvv