-er a-a a-b aaa aab aad aae aak aao aar ab- aba abb abd abe abk abo abr ad- ada adb add ade adk ado adr aea aeb aed aee aek aeo aer aka akb akd ake akk ako akr aoa aob aod aoe aok aoo aor ar- ara arb ard are ark aro arr baa bab bad bae bak bao bar bba bbb bbd bbe bbk bbo bbr bda bdb bdd bde bdk bdo bdr be- bea beb bed bee bek beo ber bka bkb bke bkk bko bkr boa bob bod boe bok boo bor bra brb brd bre brk bro brr daa dab dad dae dak dao dar dba dbb dbd dbe dbk dbo dbr dda ddb ddd dde ddk ddo ddr de- dea deb ded dee dek deo der dka dkb dke dkk dko dkr doa dob dod doe dok doo dor dra drb drd dre drk dro drr eaa eab ead eae eak eao ear eba ebb ebd ebe ebk ebo ebr ed- eda edb edd ede edk edo edr eea eeb eed eee eek eeo eer eka ekb ekd eke eko ekr eo- eoa eob eod eoe eok eoo eor era erb erd ere erk ero err ka- kaa kab kad kae kak kao kar kba kbb kbd kbe kbk kbo kbr kda kdb kde kdk kdo kdr ke- kea keb ked kee kek keo ker kkb kke kkk kkr koa kob kod koe kok koo kor kra krd krk kro krr oaa oab oad oae oak oao oar ob- oba obb obd obe obk obo obr oda odb odd ode odo odr oea oeb oed oee oeo oer oka okb okd oke okk oko okr oo- ooa oob ood ook ooo oor or- ora orb ord ore ork oro orr ra- raa rab rad rae rak rao rar rba rbb rbd rbe rbk rbo rbr rda rdb rdd rde rdo rdr re- rea reb red ree rek reo rer rkb rke rkk rko roa rob rod roe rok roo ror rra rrb rrd rrk rrr

a-ak a-be a-do a-ok aaaa aaab aaad aaae aaar aaba aabb aabd aada aade aaea aaka aake aaoe aaoo aara aard aare aaro abaa abab abad abae abak abar abb- abba abbb abbe abbo abbr abda abdo abed abee aber aboa abob abod abok aboo abor abra abro 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 aede aeer aeka aer- aera aerd aero 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 arka arke arko aroa arob arod aroe aroo aror arr- arra arre arrk arro arrr 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 bbad bbbb bbdd bbdo bbeb bd-r bead beak bear beba bebb bebe bebo beda bede bedo beeb beed beek beer beka beke beko beo- beod beok beor bera berd bere berk bero berr 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 brab brad brae brak brao brda brdo brea breb bred bree brek breo brer 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 dbar dddd ddre dead deae deak dear deba debe deda dedd dede dedo deeb deed deek deer dek- deka deke deor der- dera derb dere derk dero derr 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 draa drab drad drak drar drba drda drea dred dree drek drob drod drra eaba eada eadb eadd eara earb eard eare earo ebba ebbo ebbr ebed eber eboe eboo ebor ebro edad edar edda edde eddo ede- edea eder edod edra eede eeea eeee eeka eeke eera eero eka- ekab ekeb eked ekek eker ekka ekoa eode eoka eora eore erad erba erbb erbe erda erde ereb ered erer erke erob erod eroe eroo erra erre erro kaaa kaab kaak kaar kaba kabb kabd kabe kabo kabr kad- kada kadd kade kado kadr kaeo kaer kaka kake kakk kako kaoa kaok kaor kara karb kard kare kark karo karr kbaa kbab kbad kbae kbak kbar kbba kbbb kbbd kbbe kbbk kbbo kbbr kbdb kbde kbdo kbdr kbeb kbed kbee kbek kbeo kber kbkb kbkk kbko kbkr kboa kbob kbod kboe kbok kboo kbra kbrb kbrd kbre kbrk kbro kdaa kdab kdad kdae kdak kdao kdar kdbb kdbr kddb kddd kddk kddr kdeb kdka kdkb kdkd kdkk kdko kdkr kdoe kdok kdrb kdro kea- kead keak kear keba kebb kebe kebr keda kedb kedd kede kedo kedr keed keek keer keka kekb keke keko keok ker- kera kerb kere kerk kero kerr kkaa kkar kkba kkbb kkbd kkbe kkbo kkbr kkda kkdd kkdo kkea kked kkkk kkoa kkob kkoo kkor kkrb kkre kkrk kkro kkrr koab koae koak koar koba kobb kobe kobk kobo kobr koda kode kodk kodo koea koed koka kokb koke kokk koko kokr koob kook kooo koor kora korb kord kore kork koro korr krab krad krae krak krar krba krbb krbd krbe krbk krbr krda krdd krde krdo krdr krea kreb kred kree krek kreo krka krkd krke krkk krko krkr kroa krob krod kroe krok kroo kror krrb krre krrk krro krrr o-eo oade oaer oake oara oare obad obak obba obbo obea obed ober obkb oboe obok obor obra obre obro odbo odda oddd odea oded odeo oder odoo odor odra oedo oera oere