a-a a-b a-c aaa aab aac aah aao aar aau aav ab- aba abb abc abh abo abr abu abv ac- aca acb acc ach aco acr acu acv aha ahb ahc ahh aho ahr ahu ahv aoa aob aoc aoh aoo aor aou aov ar- ara arb arc arh aro arr aru arv au- aua aub auc auh auo aur auv av- ava avb avc avh avo avr avu b-u baa bab bac bah bao bar bau bav bba bbb bbc bbh bbo bbr bbu bca bcb bcc bch bco bcr bcu bcv bha bhb bhc bhh bho bhr bhu bhv boa bob boc boh boo bor bou bov bra brb brh bro brr bru brv bua bub buc buh buo bur buu bva bvb bvc bvh bvo bvr bvu bvv c-- caa cab cac cah cao car cau cav cba cbb cbc cbh cbo cbr cbu cbv cca ccb ccc cch cco ccr ccu ccv ch- cha chb chc chh cho chr chu chv co- coa cob coc coh coo cor cou cov cra crb crc crh cro crr cru crv cua cub cuc cuh cuo cur cuu cuv cva cvb cvc cvh cvo cvr cvu cvv haa hab hac hah hao har hau hav hba hbb hbc hbh hbo hbr hbu hbv hca hcb hcc hch hco hcr hcv hha hhb hhc hhh hho hhr hhu hhv hoa hob hoc hoh hoo hor hou hov hr- hra hrb hrc hrh hro hrr hru hrv hua hub huc huh huo hur huu huv hv- hva hvb hvc hvo hvr hvv oaa oab oac oah oao oar oau oav ob- oba obb obc obh obo obr obu obv oc- oca ocb occ och oco ocr ocu ocv oha ohc ohh oho ohr ohu oo- ooa oob ooc ooh ooo oor oov or- ora orb orc orh oro orr oru orv ou- oua ouc ouh ouo our ov- ova ovb ovc ovh ovo ovv ra- raa rab rac rah rao rar rau rav rba rbb rbc rbh rbo rbr rbu rca rcb rcc rch rco rcr rcu rcv rh- rha rhb rhc rhh rho rhr rhu rhv roa rob roc roh roo ror rou rov rra rrb rrc rrh rrr rru rua rub ruc ruh ruo rur ruu ruv rva rvb rvc rvh rvo rvr rvu rvv ua- uaa uab uac uah uao uar uau uav uba ubb ubc ubh ubo ubr ubu ubv uca ucb ucc uch uco ucr ucu ucv uha uhb uhc uhh uho uhr uhu uhv uoa uob uoc uoo uor ur- ura urb urc uro urr uru uua uuc uur uuu uva uvb uvc uvo uvu uvv v-a vaa vab vac vah vao var vau vav vba vbc vbh vbo vbr vbv vca vcc vch vco vcr vcu vh- vha vhb vhc vho voa vob voc voh voo vor vou vov vra vrb vrc vrh vrr vru vur vuv vva vvb vvc vvo vvr vvv

-hou -vac a-ha aaaa aaab aaac aaah aaar aaav aaba aabb aabc aabh aaca aacb aacc aach aaco aacr aacu aacv aaha aaoo aara aarc aaro aaru aava abaa abab abac abar abau abb- abba abbb abbo abbr abca abcb abcc abch abcr abha abho abhr aboa abob aboh aboo abor abou abov abra abrc abro abua abva acaa acab acac acar acba acca accc acch acco accu acha achh acho achr achu acoa acoh acor acou acr- acra acrc acro acrr acrv acu- acuo acur acvv ahab ahac ahah ahar ahau ahha ahoa ahor ahra ahrc ahrr ahua ahva aoah aoba aoca aora aorb arab arac arah arar arau arba arbh arc- arca arch arco arh- aroa arob aroo aror arr- arra arrc arrh arro arrr arru arua arub arva arvo auaa auca auch aur- aura auro avab avao avar avcc avco avor avou avra avro avur avva avvo baaa baah baar baba babb babo babr babu bac- baca bacc bach baco baha baho bahr bahu baoh bar- bara barb barc barh baro barr baru bau- baur bava bavu bbau bbbb bbch bbrc bcaa bcar bcbc bcca bccc bcor bcra bcru bcuc bcvo bhao bhar bhca bhcc bhor bhra bhur bhuu boab boac boar boba bobb bobo bobu boca boch boco bocu boha boho bohr bohu boob booc booh boor bor- bora borh boro borr boru boua bouh bour bova bovo brab brac brah brao brau brav brca brcb broa brob broc broh broo bror brou brrr bruc bruh bruv buar buba bubb bubo bubu buca bucc buch buco bucu buha buho buhr bur- bura burb burh buro burr buru c-bo caaa caab caac caah caba cabo cabu cac- caca cacc cach caco cacr caha caor cara carb carc caro carr cauc cauo cava cavo cavu cbac cbar cbbc cbca cbcc cbcr cbcu cbha cbrh cbva cbvb cbvr ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccu cccv ccha cchr ccob ccoc ccra ccrc ccuc ccvo chaa chab chac chah chao char chau chav chca chch chha choc choh choo chor chou chov chra chrb chrc chro chrr chua chub chur chvo coba cobb cobh cobo cobu coca coch coco cocu coha coho coob cooh cor- cora corb corc coro corr coua coub cour cova covo crab crac crar crau crbc crbu crca crcc crcr crob croc croh croo cror crub cuau cub- cuba cubb cuca cucc cura curb curo curr cvac cvar cvca cvcc cvra cvrr haab haar haba habo habu haco haha haho haor hara harc harh haro harr haru harv hau- hava hbar hboc hcbc hcca hccb hccc hcch hhaa hhhh hoac hoar hoba hobo hoca hoch hocr hoha hoho hoor hora horc horo horr hour hova hrac hrob hrrc huac huah huba hubb hubo huch hucu huhu huor hura huro hurr huru huub hvac hvar hvcc oaau oahu oara obba obbo obor obra obrh obro obuh ocab ocac ocbc occa occc ocha ocra ocro ocrr ocur ohau ohba ohcc ohho ohob ohoh ohra ooaa ooba oocr ooha ooho oooh oooo oora orab orac orah