-er a-a a-b aaa aab aad aae aak aao aar aau ab- aba abb abd abe abk abo abr abu ad- ada adb add ade adk ado adr adu aea aeb aed aee aek aeo aer aeu aka akb akd ake akk ako akr aku aoa aob aod aoe aok aoo aor aou ar- ara arb ard are ark aro arr aru au- aua aub aud aue auk auo aur b-u baa bab bad bae bak bao bar bau bba bbb bbd bbe bbk bbo bbr bbu bda bdb bdd bde bdk bdo bdr bdu be- bea beb bed bee bek beo ber beu bka bkb bke bkk bko bkr boa bob bod boe bok boo bor bou bra brb brd bre brk bro brr bru bua bub bud bue buk buo bur buu daa dab dad dae dak dao dar dau dba dbb dbd dbe dbk dbo dbr dbu dda ddb ddd dde ddk ddo ddr ddu de- dea deb ded dee dek deo der deu dka dkb dke dkk dko dkr dku doa dob dod doe dok doo dor dou dra drb drd dre drk dro drr dru dua dub dud due duk duo dur eaa eab ead eae eak eao ear eau eba ebb ebd ebe ebk ebo ebr ebu ed- eda edb edd ede edk edo edr edu eea eeb eed eee eek eeo eer eka ekb ekd eke eko ekr eku eo- eoa eob eod eoe eok eoo eor eou era erb erd ere erk ero err eru eu- eua eub eud eue eur ka- kaa kab kad kae kak kao kar kau kba kbb kbd kbe kbk kbo kbr kbu kda kdb kde kdk kdo kdr kdu ke- kea keb ked kee kek keo ker kkb kke kkk kkr kku koa kob kod koe kok koo kor kou kra krd krk kro krr kru kub kud kue kuk kur kuu oaa oab oad oae oak oao oar oau ob- oba obb obd obe obk obo obr obu oda odb odd ode odo odr odu oea oeb oed oee oeo oer oka okb okd oke okk oko okr oku oo- ooa oob ood ook ooo oor or- ora orb ord ore ork oro orr oru ou- oua oud oue ouk ouo our ra- raa rab rad rae rak rao rar rau rba rbb rbd rbe rbk rbo rbr rbu rda rdb rdd rde rdo rdr rdu re- rea reb red ree rek reo rer reu rkb rke rkk rko rku roa rob rod roe rok roo ror rou rra rrb rrd rrk rrr rru rua rub rud rue ruk ruo rur ruu ua- uaa uab uad uae uak uao uar uau uba ubb ube ubk ubo ubr ubu uda udb udd ude udk udo udr udu uea ueb ued uee uer uka ukb uke ukk ukr uku uoa uob uod uoe uok uoo uor ur- ura urb urd ure urk uro urr uru uua uue uur uuu

a-ak a-be a-do a-ok aaaa aaab aaad aaae aaar aaba aabb aabd aada aade aadu aaea aaka aake aaku aaoe aaoo aara aard aare aaro aaru abaa abab abad abae abak abar abau abb- abba abbb abbe abbo abbr abda abdo abdu abed abee aber aboa abob abod abok aboo abor abou abra abro abua abud abue abuk adaa adab adad adae adak adao adar adba adda addd adde addo addr addu adea adeb adee adeo ader adob adod adoe adok adoo ador adra adre adro adua adub adue aduk adur aede aeer aeka aer- aera aerd aero akaa akae akao akar aked akee aker akeu akka akko akku akok akr- akra akre akua aoba aoeu aora aorb arab arad arae arak arar arau arba arbe arda arde ardo ardu area ared aree arek areo areu arka arke arko aroa arob arod aroe aroo aror arr- arra arre arrk arro arrr arru arua arub arud arue auaa aube aude audo auer auke aur- aura aurd aure auro baaa baad baak baar baba babb babe babo babr babu bada badb badd bade bado badr badu baed baek baer bak- baka bake bako bakr baku bar- bara barb bard bare bark baro barr baru bau- baud bauk baur bbad bbau bbbb bbdd bbdo bbeb bd-r bead beak bear beau beba bebb bebe bebo beda bede bedo bedu beeb beed beek beer beka beke beko beo- beod beok beor bera berd bere berk bero berr beru beuk beur boab boad boak boar boba bobb bobe bobo bobu boda bodb bode bodo bodu boea boee boeo boer boka boke boko boku boob bood booe book boor bor- bora bord bore bork boro borr boru boua boud boue bouk bour brab brad brae brak brao brau brda brdo brea breb bred bree brek breo brer brka brkb broa brob brod broe brok broo bror brou brrr brud brue buad buar buba bubb bube bubo bubu buda budb budd bude budo budu buea buer bueu buka buke bukk buko buku bur- bura burb burd bure burk buro burr buru d-bo daab daad daae daar daau daba dabb dabo dabu dada dade dado dadu daeb daer daeu daka dake dako daku daou dara darb dard dare dark daro darr daru daub daud daue dauk daur dbar dddd ddre ddub dead deae deak dear deau deba debe debu deda dedd dede dedo dedu deeb deed deek deer dek- deka deke deor der- dera derb dere derk dero derr deua deue deuk deur dkba doab doae doak doar doba dobb dobe dobu dod- doda dodd dode dodo doea doek doer doka doke doko doob dood dook door dora dord dore dork doro dorr doru doub doud doue douk dour draa drab drad drak drar drau drba drda drea dred dree drek drob drod drou drra drua drub drue druk druu duaa duab duad duar dub- duba dubb dube dubu duda dudd dude dudo dudu duer duka duke duku duo- dura dure durk duro duru duur eaba eada eadb eadd eara earb eard eare earo ebba ebbo ebbr