aaaa aaac aaaf aaar aaca aacc aacf aacr aact aafa aafc aaff aara aarc aart aata aatc aatf aatt ac-t acaa acac acar acat acca accc accf acct acfc acft acr- acra acrc acrr acta actc actf actt 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 at-t ataa atac atar atat atca atcc atcf atcr atfc atra atrc atta attr caaa caac caaf caat cac- caca cacc cacr cafa cafc caff cara carc carf carr cart cat- cata catc catf catt ccaa ccac ccaf ccar ccat ccca cccc cccf ccfa ccfc ccff ccra ccrc ccrf ccrt cctc cctt cfaa cfac cfar cfca cfcf cffr cfra cfrt cfta cftc cftr crac craf crar crat crca crcc crcr crfc crrt crtc crtf ctca ctcf ctfc ctrc ctta faaa faac faca facc fact fafa fafc faff fara farc farr fart fata fatc fatf fatt fcar fcat fcca fccf fcra ffar ffcc ffff ffrr fftf frac frat frcc frfc frta ft-c ftfc raaf raat rac- raca racc ract rafa rafc raff raft rara rarf rata ratf ratt rcac rcaf rccc rcfc rctc rffc rftc rrat rrfc rrrr rtca rtcc rtfc taa- taaf taar taat taca tacc tact tafa tafc taff taft tara tarc tarf tarr tart tata tatr tatt tcca tccc tcfc tctc tfca tftc traa trac traf trat trca trcc trfc trfr trra trtc trtr ttfa ttfc ttff tttt