-er a-a a-b aaa aab aad aae aak aao aar aav ab- aba abb abd abe abk abo abr abv ad- ada adb add ade adk ado adr adv aea aeb aed aee aek aeo aer aev aka akb akd ake akk ako akr akv aoa aob aod aoe aok aoo aor aov ar- ara arb ard are ark aro arr arv av- ava avb avd ave avk avo avr baa bab bad bae bak bao bar bav bba bbb bbd bbe bbk bbo bbr bda bdb bdd bde bdk bdo bdr bdv be- bea beb bed bee bek beo ber bev bka bkb bke bkk bko bkr bkv boa bob bod boe bok boo bor bov bra brb brd bre brk bro brr brv bva bvb bvd bve bvk bvo bvr bvv daa dab dad dae dak dao dar dav dba dbb dbd dbe dbk dbo dbr dbv dda ddb ddd dde ddk ddo ddr de- dea deb ded dee dek deo der dev dka dkb dke dkk dko dkr doa dob dod doe dok doo dor dov dra drb drd dre drk dro drr drv dva dvb dvd dve dvk dvr eaa eab ead eae eak eao ear eav eba ebb ebd ebe ebk ebo ebr ebv ed- eda edb edd ede edk edo edr eea eeb eed eee eek eeo eer eev eka ekb ekd eke eko ekr ekv eo- eoa eob eod eoe eok eoo eor era erb erd ere erk ero err erv eva evb evd eve evo evr evv ka- kaa kab kad kae kak kao kar kav kba kbb kbd kbe kbk kbo kbr kda kdb kde kdk kdo kdr ke- kea keb ked kee kek keo ker kev kkb kke kkk kkr kkv koa kob kod koe kok koo kor kra krd krk kro krr krv kva kvb kvk kvo kvr kvv oaa oab oad oae oak oao oar oav ob- oba obb obd obe obk obo obr obv oda odb odd ode odo odr odv oea oeb oed oee oeo oer oka okb okd oke okk oko okr oo- ooa oob ood ook ooo oor oov or- ora orb ord ore ork oro orr orv ov- ova ovb ovd ove ovo ovv ra- raa rab rad rae rak rao rar rav rba rbb rbd rbe rbk rbo rbr rda rdb rdd rde rdo rdr rdv re- rea reb red ree rek reo rer rev rkb rke rkk rko rkv roa rob rod roe rok roo ror rov rra rrb rrd rrk rrr rva rvb rvd rve rvo rvr rvv v-a v-e vaa vab vad vae vak vao var vav vba vbd vbk vbo vbr vbv vdb vdd vde vdk vdo vdr vdv vea veb ved vee vek veo ver vka vkb voa vob vod voe vok voo vor vov vra vrb vrd vre vrk vrr vva vvb vvo vvr vvv

a-ak a-be a-do a-ok aaaa aaab aaad aaae aaar aaav aaba aabb aabd aada aade aaea aaev aaka aake aaoe aaoo aara aard aare aaro aava abaa abab abad abae abak abar abb- abba abbb abbe abbo abbr abda abdo abed abee aber aboa abob abod abok aboo abor abov abra abro abva abvd adaa adab adad adae adak adao adar adba adda addd adde addo addr adea adeb adee adeo ader adob adod adoe adok adoo ador adra adre adro advb aede aeer aeka aer- aera aerd aero aeva akaa akae akao akar aked akee aker akka akko akok akr- akra akre aoba aora aorb arab arad arae arak arar arba arbe arda arde ardo area ared aree arek areo arev arka arke arko aroa arob arod aroe aroo aror arr- arra arre arrk arro arrr arva arve arvo avab avao avar avda avea aveo aver avor avra avre avro avva avvo baaa baad baak baar baba babb babe babo babr bada badb badd bade bado badr baed baek baer bak- baka bake bako bakr bar- bara barb bard bare bark baro barr bava bave bbad bbbb bbdd bbdo bbeb bd-r bdav bead beak bear beav beba bebb bebe bebo beda bede bedo beeb beed beek beer beka beke beko beo- beod beok beor bera berd bere berk bero berr bevo boab boad boak boar boba bobb bobe bobo boda bodb bode bodo boea boee boeo boer boka boke boko boob bood booe book boor bor- bora bord bore bork boro borr bova bove bovo brab brad brae brak brao brav brda brdo brea breb bred bree brek breo brer brev brka brkb broa brob brod broe brok broo bror brrr d-bo daab daad daae daar daba dabb dabo dada dade dado daeb daer daka dake dako dara darb dard dare dark daro darr dava dave dbar dddd ddre dead deae deak dear deba debe deda dedd dede dedo deeb deed deek deer deev dek- deka deke deor der- dera derb dere derk dero derr derv deva deve devo dkba doab doae doak doar doba dobb dobe dod- doda dodd dode dodo doea doek doer doka doke doko doob dood dook door dora dord dore dork doro dorr dove draa drab drad drak drar drba drda drea dred dree drek drev drob drod drra dvar dvda dvdr dvoa dvor dvra eaba eada eadb eadd eara earb eard eare earo eave ebba ebbo ebbr ebed eber eboe eboo ebor ebro edad edar edda edde eddo ede- edea eder edod edra edve eede eeea eeee eeka eeke eera eero eeva eka- ekab ekeb eked ekek eker ekka ekoa eode eoka eora eore erad erba erbb erbe erda erde ereb ered erer erev erke erob erod eroe eroo erra erre erro erve evae evar evdb evea ever evoe evoo evra evre evvk kaaa kaab kaak kaar kaba kabb kabd kabe kabo kabr kad- kada kadd kade kado kadr kadv kaeo kaer kaka kake kakk kako kaoa kaok kaor kara karb kard kare kark karo karr karv kava kavb kave kavo kavv kbaa kbab kbad kbae kbak kbar kbba kbbb kbbd kbbe kbbk kbbo