a-a a-b a-c aaa aab aac aad aan aao aar aau ab- aba abb abc abd abn abo abr abu ac- aca acb acc acd acn aco acr acu ad- ada adb adc add adn ado adr adu an- ana anb anc and ann ano anr anu aoa aob aoc aod aon aoo aor aou ar- ara arb arc ard arn aro arr aru au- aua aub auc aud aun auo aur b-u baa bab bac bad ban bao bar bau bba bbb bbc bbd bbn bbo bbr bbu bca bcb bcc bcd bcn bco bcr bcu bda bdb bdc bdd bdo bdr bdu bna bnb bnc bnd bnn bno bnr bnu boa bob boc bod bon boo bor bou bra brb brd brn bro brr bru bua bub buc bud bun buo bur buu c-- caa cab cac cad can cao car cau cba cbb cbc cbd cbn cbo cbr cbu cca ccb ccc ccd ccn cco ccr ccu cda cdb cdc cdd cdn cdo cdr cdu cn- cna cnb cnc cnd cnn cno cnr cnu co- coa cob coc cod con coo cor cou cra crb crc crd crn cro crr cru cua cub cuc cud cun cuo cur cuu daa dab dac dad dan dao dar dau dba dbb dbc dbd dbn dbo dbr dbu dca dcb dcc dcd dcn dco dcr dcu dda ddb ddc ddd ddn ddo ddr ddu dna dnb dnc dnd dnn dno dnr doa dob doc dod don doo dor dou dra drb drc drd drn dro drr dru dua dub duc dud dun duo dur naa nab nac nad nan nao nar nau nba nbb nbc nbd nbn nbo nbr nbu nca ncb ncc ncd ncn nco ncr ncu nda ndb ndc ndd ndn ndo ndr ndu nna nnb nnc nnn nno nnu no- noa nob noc nod non noo nor nou nra nrb nrc nrd nrn nro nrr nru nua nub nuc nud nun nuo nur nuu oaa oab oac oad oan oao oar oau ob- oba obb obc obd obn obo obr obu oc- oca ocb occ ocd ocn oco ocr ocu oda odb odc odd odn odo odr odu on- ona onb onc ond onn ono onr onu oo- ooa oob ooc ood oon ooo oor or- ora orb orc ord orn oro orr oru ou- oua ouc oud oun ouo our ra- raa rab rac rad ran rao rar rau rba rbb rbc rbd rbn rbo rbr rbu rca rcb rcc rcd rcn rco rcr rcu rda rdb rdc rdd rdn rdo rdr rdu rna rnb rnc rnd rnn rno rnr rnu roa rob roc rod ron roo ror rou rra rrb rrc rrd rrn rrr rru rua rub ruc rud run ruo rur ruu ua- uaa uab uac uad uan uao uar uau uba ubb ubc ubn ubo ubr ubu uca ucb ucc ucd ucn uco ucr ucu uda udb udc udd udn udo udr udu un- una unb unc und unn uno unr unu uoa uob uoc uod uon uoo uor ur- ura urb urc urd urn uro urr uru uua uuc uun uur uuu

-ana a-do a-un aaaa aaab aaac aaad aaan aaar aaba aabb aabc aabd aaca aacb aacc aacd aacn aaco aacr aacu aada aadc aadu aana aand aaon aaoo aara aarc aard aaro aaru abaa abab abac abad aban abar abau abb- abba abbb abbo abbr abca abcb abcc abcd abcn abcr abda abdo abdu abnu aboa abob abod abon aboo abor abou abra abrc abro abua abud abun acaa acab acac acad acan acar acba acca accc accd acco accu acda acdb acdc acoa acod acon acor acou acr- acra acrc acro acrr acu- acuo acur adaa adab adac adad adan adao adar adba adbc adcc adda addc addd addn addo addr addu adna adob adoc adod adon adoo ador adra adro adua adub adun adur ana- anaa anab anac anad anan anao anar anau anba anbb anbo anbu anca ancc anco and- anda ando andr anna annb anno ano- anoa anod anon anor anrc anua anub anun aoba aoca aonb aono aora aorb aorn aoun arab arac arad aran arar arau arba arc- arca arco arda ardc ardo ardu arna arnd arno aroa arob arod aron aroo aror arr- arra arrc arro arrr arru arua arub arud arun auaa auca audc audo auna aur- aura aurd auro baaa baad baan baar baba babb babo babr babu bac- baca bacc bacn baco bada badb badd bado badr badu bana banc band bann bano banr banu baon bar- bara barb barc bard barn baro barr baru bau- baud baur bbad bbau bbbb bbdd bbdo bbrc bcaa bcar bcbc bcca bccc bcda bcnu bcor bcra bcru bcuc bd-r bdbc bddc bdna bnoc bnor bnrr boab boac boad boan boar boba bobb bobo bobu boca boco bocu boda bodb bodo bodu bona bonc bond bonn bono bonu boob booc bood boon boor bor- bora bord born boro borr boru boua boud boun bour brab brac brad bran brao brau brca brcb brda brdo brna brno broa brob broc brod bron broo bror brou brrr bruc brud brun buad buar buba bubb bubo bubu buca bucc buco bucu buda budb budd budo budu buna bunb bund bunn buno bunu buon bur- bura burb burd burn buro burr buru c-bo c-cd caaa caab caac caan caba cabo cabu cac- caca cacc caco cacr cada cadc cadd cado cadr cadu cana canc cand cann cano caod caor cara carb carc card carn caro carr cauc cauo cbac cbar cbbc cbca cbcc cbcn cbcr cbcu cbdb cbdc cbdn cbdo cbna cbnd cbrd cbrn ccaa ccab ccac ccad ccar ccba ccbc ccbn ccca cccb cccc cccu ccdc ccdn ccdr ccna ccnb ccnc ccnr ccnu ccob ccoc ccod ccra ccrc ccuc cd-r cdaa cdac cdad cdba cdda cddb cddr cdna cdnb cdnc cdon cnaa cnac cnbc cnco cnda cndd cnna cnrc cnrr coad coan coba cobb cobo cobu coca coco cocu coda codd con- cona conc cond conn cono