-ana a-un aaaa aaab aaac aaan aaar aaba aabb aabc aaca aacb aacc aacn aacr aacu aana aara aarc aaru abaa abab abac aban abar abau abb- abba abbb abbr abca abcb abcc abcn abcr abnu abra abrc abua abun acaa acab acac acan acar acba acca accc accu acr- acra acrc acrr acu- acur ana- anaa anab anac anan anar anau anba anbb anbu anca ancc anna annb anrc anua anub anun arab arac aran arar arau arba arc- arca arna arr- arra arrc arrr arru arua arub arun auaa auca auna aur- aura baaa baan baar baba babb babr babu bac- baca bacc bacn bana banc bann banr banu bar- bara barb barc barn barr baru bau- baur bbau bbbb bbrc bcaa bcar bcbc bcca bccc bcnu bcra bcru bcuc bnrr brab brac bran brau brca brcb brna brrr bruc brun buar buba bubb bubu buca bucc bucu buna bunb bunn bunu bur- bura burb burn burr buru caaa caab caac caan caba cabu cac- caca cacc cacr cana canc cann cara carb carc carn carr cauc cbac cbar cbbc cbca cbcc cbcn cbcr cbcu cbna cbrn ccaa ccab ccac ccar ccba ccbc ccbn ccca cccb cccc cccu ccna ccnb ccnc ccnr ccnu ccra ccrc ccuc cnaa cnac cnbc cnna cnrc cnrr crab crac cran crar crau crbc crbu crca crcc crcr crna crub crun cuan cuau cub- cuba cubb cuca cucc cucn cuna cura curb curn curr naaa naab naac naan naar naba nabc nabu naca nacc nan- nana nanb nann nanu nara narc narn narr naru naur nbaa nbar nbbc nbca nbcc ncaa ncac ncar ncba ncbc ncca nccc nccn nccr nccu ncna ncnc ncra ncrc ncua nnnn nrab nrca nrna nrrc nuan nuba nubc nuca nucu nuna nunc nunn nura nurc nurn nurr nuru raab raan raba rabb rabu rac- raca racc racu rana ranc rann rara rarb raua raub rauc raun rbbb rbbr rcac rcbc rccb rccc rcnr rnbr rrna rrrr rrun ruan ruba rubb rubu ruca runa runc runn rura rurc ruru ruun uabc uaca uarc uaru uaua ubac ubar ubba ubra ucan ucar ucbc ucca ucrc ucua unaa unac unan unar unau unca uncc unna unra urac uran urau urba urca urna urra urun urur uuuu