-ana aaaa aaac aaaf aaan aaar aaca aacc aacf aacn aacr aafa aafc aaff aana aara aarc acaa acac acan acar acca accc accf acfc acr- acra acrc acrr afaa afan afar afca afcc affa affc afr- afra afrc ana- anaa anac anan anar anca ancc anfa anna anrc arac araf aran arar arc- arca arfa arfc arff arna arr- arra arrc arrr caaa caac caaf caan cac- caca cacc cacr cafa cafc caff cana canc cann cara carc carf carn carr ccaa ccac ccaf ccar ccca cccc cccf ccfa ccfc ccff ccna ccnc ccnf ccnr ccra ccrc ccrf cfaa cfac cfar cfca cfcf cfcn cffr cfnr cfra cfrn cnaa cnac cnfa cnna cnrc cnrr crac craf cran crar crca crcc crcr crfc crna faaa faac faan faca facc fafa fafc faff fana fanc fara farc farr fcar fcca fccf fcra ffar ffcc ffff ffrr fnac fnar frac fran frcc frcn frfc naaa naac naan naar naca nacc nacf nafa nafc naff nan- nana nann nara narc narf narn narr ncaa ncac ncar ncca nccc nccf nccn nccr ncfc ncna ncnc ncra ncrc nfaa nfff nfra nnnn nrca nrfc nrna nrrc raaf raan rac- raca racc rafa rafc raff rana ranc rann rara rarf rcac rcaf rccc rcfc rcnr rffc rnaf rrfc rrna rrrr