-vac aaaa aaac aaaf aaar aaav aaca aacc aacf aacr aact aacv aafa aafc aaff aara aarc aart aata aatc aatf aatt aava ac-t acaa acac acar acat acca accc accf acct acfc acft acr- acra acrc acrr acrv acta actc actf actt actv acvv afaa afar afat afca afcc affa affc afft afr- afra afrc afta aftc arac araf arar arat arc- arca arct arfa arfc arff arft arr- arra arrc arrr arrt arta artc artr artv arva at-t ataa atac atar atat atca atcc atcf atcr atfc atra atrc atta attr avar avat avcc avra avva caaa caac caaf caat cac- caca cacc cacr cafa cafc caff cara carc carf carr cart cat- cata catc catf catt catv cava ccaa ccac ccaf ccar ccat ccca cccc cccf cccv ccfa ccfc ccff ccra ccrc ccrf ccrt cctc cctt cctv cfaa cfac cfar cfav cfca cfcf cffr cfra cfrt cfta cftc cftr crac craf crar crat crca crcc crcr crfc crrt crtc crtf crtv ctca ctcf ctfc ctrc ctta ctvt cvac cvar cvca cvcc cvfr cvra cvrr faaa faac faca facc fact fafa fafc faff fara farc farr fart fata fatc fatf fatt fava favc fcar fcat fcca fccf fcra ffar ffcc ffff ffrr fftf fr-v frac frat frcc frfc frta frvt ft-c ftfc raaf raat rac- raca racc ract racv rafa rafc raff raft rara rarf rata ratf ratt rava rcac rcaf rccc rcfc rctc rctv rcvr rffc rftc rrat rrfc rrrr rtca rtcc rtfc rtva rv-c rvca taa- taaf taar taat taca tacc tact tacv tafa tafc taff taft tara tarc tarf tarr tart tata tatr tatt tatv tava tcca tccc tcfc tctc tfca tftc traa trac traf trat trav trca trcc trfc trfr trra trtc trtr ttfa ttfc ttff tttt tvac tvrr tvtv vaar vaat vaca vafa vara varf varr vart vata vatt vava vcat vfat vfcc vrac vrav vtac vvvv