-ana -vac aaaa aaac aaan aaar aaav aaca aacc aacn aaco aacr aacv aana aaon aaoo aara aarc aaro aava acaa acac acan acar acca accc acco acoa acon acor acr- acra acrc acro acrr acrv acvv ana- anaa anac anan anao anar anca ancc anco anna anno ano- anoa anon anor anrc aoca aono aora aorn arac aran arar arc- arca arco arna arno aroa aron aroo aror arr- arra arrc arro arrr arva arvn arvo avan avao avar avcc avco avon avor avra avro avva avvo caaa caac caan cac- caca cacc caco cacr cana canc cann cano caor cara carc carn caro carr cava cavo ccaa ccac ccar ccca cccc cccv ccna ccnc ccnr ccoc ccra ccrc ccvo cnaa cnac cnco cnna cnrc cnrr coan coca coco con- cona conc conn cono conv coon cor- cora corc corn coro corr cova covo crac cran crar crca crcc crcr crna croc cron croo cror cvac cvar cvca cvcc cvra cvrr naaa naac naan naar naca nacc naco nan- nana nann nano naoc naor nara narc narn naro narr nava navo navr navv ncaa ncac ncar ncca nccc nccn nccr ncna ncnc ncoa ncoc ncor ncra ncrc nnnn noaa noac noco non- nona nonn nono noo- noon nooo noor noov nor- nora norc norn noro norr norv nov- nova novo nrca nrna nroc nron nrrc nvcc oara ocac ocan occa occc occn ocna ocon ocra ocro ocrr onan onar onc- onca onco onna onno onon onor onra ooaa oocr oona oooo oora orac oran orao orar orav orca orco orna ornc orno oro- oron oror orra orro orvr ovan ovar ovo- ovon ovoo ovra raan rac- raca racc raco racv rana ranc rann rano raoc rara raro rava rcac rccc rcnr rcon rcvr rnco roan roar roca rocc roco rona ronc rono roon roor rora rorc roro rova rovo rrna rrrr rv-c rvca vaan vaar vaca vaco vana vanc vann vano vara varn varr vava vcon vnav voar voca vona vonn vooc voor vor- vora voro vrac vran vrav vrnn vroc vron vvvv