-ana aaaa aaab aaac aaan aaar aaba aabb aabc aaca aacb aacc aacn aacr aana aara aarc abaa abab abac abaj aban abar abb- abba abbb abbr abca abcb abcc abcn abcr abra abrc acaa acab acac acan acar acba acca accc acr- acra acrc acrr ajab ajac ajan ajar ajba ajna ana- anaa anab anac anan anar anba anbb anca ancc anja anna annb anrc arab arac aran arar arba arc- arca arja arna arr- arra arrc arrr baaa baan baar baba babb babr bac- baca bacc bacn baja bana banc banj bann banr bar- bara barb barc barn barr bbbb bbrc bcaa bcar bcbc bcca bccc bcra bjcc bnrr brab brac braj bran brca brcb brna brnj brrr caaa caab caac caan caba cac- caca cacc cacr caja cana canc cann cara carb carc carj carn carr cbac cbar cbbc cbca cbcc cbcn cbcr cbna cbrj cbrn ccaa ccab ccac ccar ccba ccbc ccbn ccca cccb cccc ccna ccnb ccnc ccnr ccra ccrc cjan cjar cjbc cjca cjcb cjcj cjnb cjnr cjrb cjrc cjrj cjrn cnaa cnac cnbc cnna cnnj cnrc cnrr crab crac craj cran crar crbc crca crcc crcr crna jaan jaar jaba jabr jaca jacc jaja jana jann jara jarc jarr jbaa jbar jcbc jccc jcrc jjar jjcc jrbr naaa naab naac naan naar naba nabc naca nacc naja najr nan- nana nanb nann nara narc narn narr nbaa nbar nbbc nbbj nbca nbcc ncaa ncac ncar ncba ncbc ncca nccc nccn nccr ncna ncnc ncra ncrc njaa njac nnnn nrab nrca nrna nrrc raab raaj raan raba rabb rac- raca racc raja rana ranc rann rara rarb rbbb rbbr rcac rcbc rccb rccc rcnr rnbr rrna rrrr