a-a a-b aaa aab aad aak aao aar aau ab- aba abb abd abk abo abr abu ad- ada adb add adk ado adr adu aka akb akd akk ako akr aku aoa aob aod aok aoo aor aou ar- ara arb ard ark aro arr aru au- aua aub aud auk auo aur b-u baa bab bad bak bao bar bau bba bbb bbd bbk bbo bbr bbu bda bdb bdd bdk bdo bdr bdu bka bkb bkk bko bkr boa bob bod bok boo bor bou bra brb brd brk bro brr bru bua bub bud buk buo bur buu daa dab dad dak dao dar dau dba dbb dbd dbk dbo dbr dbu dda ddb ddd ddk ddo ddr ddu dka dkb dkk dko dkr dku doa dob dod dok doo dor dou dra drb drd drk dro drr dru dua dub dud duk duo dur ka- kaa kab kad kak kao kar kau kba kbb kbd kbk kbo kbr kbu kda kdb kdk kdo kdr kdu kkb kkk kkr kku koa kob kod kok koo kor kou kra krd krk kro krr kru kub kud kuk kur kuu oaa oab oad oak oao oar oau ob- oba obb obd obk obo obr obu oda odb odd odo odr odu oka okb okd okk oko okr oku oo- ooa oob ood ook ooo oor or- ora orb ord ork oro orr oru ou- oua oud ouk ouo our ra- raa rab rad rak rao rar rau rba rbb rbd rbk rbo rbr rbu rda rdb rdd rdo rdr rdu rkb rkk rko rku roa rob rod rok roo ror rou rra rrb rrd rrk rrr rru rua rub rud ruk ruo rur ruu ua- uaa uab uad uak uao uar uau uba ubb ubk ubo ubr ubu uda udb udd udk udo udr udu uka ukb ukk ukr uku uoa uob uod uok uoo uor ur- ura urb urd urk uro urr uru uua uur uuu

a-ak a-do a-ok aaaa aaab aaad aaar aaba aabb aabd aada aadu aaka aaku aaoo aara aard aaro aaru abaa abab abad abak abar abau abb- abba abbb abbo abbr abda abdo abdu aboa abob abod abok aboo abor abou abra abro abua abud abuk adaa adab adad adak adao adar adba adda addd addo addr addu adob adod adok adoo ador adra adro adua adub aduk adur akaa akao akar akka akko akku akok akr- akra akua aoba aora aorb arab arad arak arar arau arba arda ardo ardu arka arko aroa arob arod aroo aror arr- arra arrk arro arrr arru arua arub arud auaa audo aur- aura aurd auro baaa baad baak baar baba babb babo babr babu bada badb badd bado badr badu bak- baka bako bakr baku bar- bara barb bard bark baro barr baru bau- baud bauk baur bbad bbau bbbb bbdd bbdo bd-r boab boad boak boar boba bobb bobo bobu boda bodb bodo bodu boka boko boku boob bood book boor bor- bora bord bork boro borr boru boua boud bouk bour brab brad brak brao brau brda brdo brka brkb broa brob brod brok broo bror brou brrr brud buad buar buba bubb bubo bubu buda budb budd budo budu buka bukk buko buku bur- bura burb burd burk buro burr buru d-bo daab daad daar daau daba dabb dabo dabu dada dado dadu daka dako daku daou dara darb dard dark daro darr daru daub daud dauk daur dbar dddd ddub dkba doab doak doar doba dobb dobu dod- doda dodd dodo doka doko doob dood dook door dora dord dork doro dorr doru doub doud douk dour draa drab drad drak drar drau drba drda drob drod drou drra drua drub druk druu duaa duab duad duar dub- duba dubb dubu duda dudd dudo dudu duka duku duo- dura durk duro duru duur kaaa kaab kaak kaar kaba kabb kabd kabo kabr kabu kad- kada kadd kado kadr kadu kaka kakk kako kaku kaoa kaok kaor kara karb kard kark karo karr karu kau- kaub kaud kauk kauo kaur kbaa kbab kbad kbak kbar kbba kbbb kbbd kbbk kbbo kbbr kbbu kbdb kbdo kbdr kbkb kbkk kbko kbkr kboa kbob kbod kbok kboo kbra kbrb kbrd kbrk kbro kbru kbua kbub kbud kbuk kbur kbuu kdaa kdab kdad kdak kdao kdar kdbb kdbr kddb kddd kddk kddr kdka kdkb kdkd kdkk kdko kdkr kdok kdrb kdro kdub kdur kkaa kkar kkba kkbb kkbd kkbo kkbr kkda kkdd kkdo kkkk kkoa kkob kkoo kkor kkrb kkrk kkro kkrr kkua kkuu koab koak koar koba kobb kobk kobo kobr kobu koda kodk kodo kodu koka kokb kokk koko kokr koku koob kook kooo koor koou kora korb kord kork koro korr koru koua koub kour kouu krab krad krak krar krba krbb krbd krbk krbr krda krdd krdo krdr krdu krka krkd krkk krko krkr krku kroa krob krod krok kroo kror krrb krrk krro krrr krua kruk krur kuar kuau kuba kubb kubd kubo kubr kubu kuda kudd kudo kudu kuka kukk kuku kuoa kuok kuoo kura kurb kurd kurk kuro kurr kuru kuub kuuk kuur kuuu oaau oara obad obak obba obbo obkb obok obor obra obro odbo odda oddd odoo odor odou odra odur okak okka okko okok okor okra okro okur ooaa ooak ooba ooda ooku oooo oora oord orab orad orak orao orar orba orbb orbo orbu orda ordo ordu orka orko oro- orok oror orra orro orub ouad our- oura ouro ouu- raab raad raak raba rabb rabk rabo rabu rada radd rado radr radu raka rakk raku raob raok rara rarb rark raro raua raub raud rauk rbbb rbbr roab road roak roar rob- roba robb robo robu roda rodd rodo roka rokk roko rokr roku roob rood rook roor rora rork roro roru roua roub roud rouk rrad rrrr ruad ruba rubb rubu ruda rudd rudo ruka rukk ruku ruok rura rurd ruro ruru ruud uaru uaua ubar ubba ubbo ubod ubra ubud udaa