-vac a-do aaaa aaac aaad aaar aaav aaca aacc aacd aaco aacr aacu aacv aada aadc aadu aaoo aara aarc aard aaro aaru aava acaa acac acad acar acca accc accd acco accu acda acdc acoa acod acor acou acr- acra acrc acro acrr acrv acu- acuo acur acvv adaa adac adad adao adar adcc adda addc addd addo addr addu adoc adod adoo ador adra adro adua adur aoca aora arac arad arar arau arc- arca arco arda ardc ardo ardu aroa arod aroo aror arr- arra arrc arro arrr arru arua arud arva arvo auaa auca audc audo aur- aura aurd auro avao avar avcc avco avda avor avou avra avro avur avva avvo c-cd caaa caac cac- caca cacc caco cacr cada cadc cadd cado cadr cadu caod caor cara carc card caro carr cauc cauo cava cavo cavu ccaa ccac ccad ccar ccca cccc cccu cccv ccdc ccdr ccoc ccod ccra ccrc ccuc ccvo cd-r cdaa cdac cdad cdda cddr cdvd coad coca coco cocu coda codd cood cor- cora corc cord coro corr coua coud cour cova covo crac crar crau crca crcc crcr crda crdc croc crod croo cror crud cuau cuca cucc cuda cura curd curo curr cvac cvar cvca cvcc cvra cvrd cvrr daad daar daau daca dada dado dadu daou dara darc dard daro darr daru daud daur dava dcca dccc dccu dccv dcra dcvd dddd ddoc ddrc doar doca doco docu dod- doda dodd dodo dood door dora dorc dord doro dorr doru douc doud dour draa drac drad drar drau drca drda drod drou drra drua druu druv duaa duad duar duca duco duda dudd dudo dudu duo- dura duro duru duur duva dvar dvda dvdr dvoa dvor dvra oaau oara ocac ocad occa occc ocra ocro ocrr ocur odac odda oddd odoo odor odou odra odur odva ooaa oocr ooda oooo oora oord orac orad orao orar orav orca orco orda ordo ordu oro- oror orra orro orvr ouac ouad oucc oudc our- oura ouro ouu- ovar ovda ovo- ovod ovoo ovra raad rac- raca racc raco racu racv rada radc radd rado radr radu raoc rara raro raua rauc raud rava rcac rccc rcdc rcrd rcuv rcvr rdac rdoc road roar roca rocc roco roda rodd rodo rood roor rora rorc roro roru roua roud rova rovo rrad rrrr ruad ruca ruda rudd rudo rura rurc rurd ruro ruru ruud ruvu rv-c rvca uaca uaoc uarc uaru uaua ucad ucar ucav ucca ucdc ucdd ucrc ucua udaa udad udar udau udca udoo udra uocc uor- uovo urac urad urao urau urca urda urdu uro- uroa uroo urra urur urva uuoc uuuu uv-a uv-c uvaa uvac uvda uvrd uvvu vaad vaar vaca vaco vada vado vadu vara vard varr varu vaud vava vdcc voad voar voca voda vodo vooc voor vor- vora vord voro voru voud vour vrac vrav vroc vuca vuco vuda vudu vvvv