-er a-a a-b aaa aab aad aae aaf aak aao aar ab- aba abb abd abe abf abk abo abr ad- ada adb add ade adf adk ado adr aea aeb aed aee aef aek aeo aer af- afa afb afd afe aff afk afo afr aka akb akd ake akk ako akr aoa aob aod aoe aof aok aoo aor ar- ara arb ard are arf ark aro arr baa bab bad bae baf bak bao bar bba bbb bbd bbe bbf bbk bbo bbr bda bdb bdd bde bdf bdk bdo bdr be- bea beb bed bee bef bek beo ber bfa bfb bfd bfe bff bfo bfr bka bkb bke bkf bkk bko bkr boa bob bod boe bof bok boo bor bra brb brd bre brf brk bro brr daa dab dad dae daf dak dao dar dba dbb dbd dbe dbf dbk dbo dbr dda ddb ddd dde ddf ddk ddo ddr de- dea deb ded dee def dek deo der dfa dfb dfd dfe dff dfk dfo dfr dka dkb dke dkk dko dkr doa dob dod doe dof dok doo dor dra drb drd dre drk dro drr eaa eab ead eae eaf eak eao ear eba ebb ebd ebe ebf ebk ebo ebr ed- eda edb edd ede edf edk edo edr eea eeb eed eee eef eek eeo eer ef- efa efb efd efe eff efo efr eka ekb ekd eke ekf eko ekr eo- eoa eob eod eoe eof eok eoo eor era erb erd ere erf erk ero err faa fab fad fae faf fak fao far fba fbb fbd fbe fbf fbk fbo fbr fda fdb fdd fde fdf fdk fdo fdr fea feb fed fee fef fek feo fer ffa ffd ffe fff ffk ffo ffr fka fkb fkf fkk foa fob foe fof fok foo for fra frb frd fre frf frk fro frr ka- kaa kab kad kae kaf kak kao kar kba kbb kbd kbe kbf kbk kbo kbr kda kdb kde kdf kdk kdo kdr ke- kea keb ked kee kef kek keo ker kfa kfd kff kfo kkb kke kkk kkr koa kob kod koe kof kok koo kor kra krd krf krk kro krr oaa oab oad oae oaf oak oao oar ob- oba obb obd obe obf obk obo obr oda odb odd ode odf odo odr oea oeb oed oee oef oeo oer of- ofa ofb ofd ofe off ofo ofr oka okb okd oke okk oko okr oo- ooa oob ood oof ook ooo oor or- ora orb ord ore orf ork oro orr ra- raa rab rad rae raf rak rao rar rba rbb rbd rbe rbf rbk rbo rbr rda rdb rdd rde rdf rdo rdr re- rea reb red ree ref rek reo rer rfa rfb rfd rfe rff rfk rfo rfr rkb rke rkf rkk rko roa rob rod roe rof rok roo ror rra rrb rrd rrf rrk rrr

a-ak a-be a-do a-ok aaaa aaab aaad aaae aaaf aaar aaba aabb aabd aada aade aaea aafa aafb aafd aaff aaka aake aaoe aaoo aara aard aare aaro abaa abab abad abae abaf abak abar abb- abba abbb abbe abbo abbr abda abdo abed abee aber abff aboa abob abod abof abok aboo abor abra abro adaa adab adad adae adak adao adar adba adda addd adde addo addr adea adeb adee adeo ader adfa adob adod adoe adok adoo ador adra adre adro aeaf aede aeer aeka aer- aera aerd aero afaa afad afak afao afar afdb afee afek afer affa affo afka afkr afoa afoe afoo afor afr- afra afre afro akaa akae akao akar aked akee aker akka akko akok akr- akra akre aoba aora aorb arab arad arae araf arak arar arba arbe arda arde ardf ardo area ared aree aref arek areo arfa arfb arff arka arke arko aroa arob arod aroe aroo aror arr- arra arre arrk arro arrr baaa baad baaf baak baar baba babb babe babo babr bada badb badd bade bado badr baed baek baer baff bafo bak- baka bake bako bakr bar- bara barb bard bare barf bark baro barr bbad bbbb bbdd bbdo bbeb bd-r bead beaf beak bear beba bebb bebe bebo beda bede bedo beeb beed beef beek beer befa befe beff befo beka beke beko beo- beod beof beok beor bera berd bere berk bero berr boab boad boak boar boba bobb bobe bobo boda bodb bode bodo boea boee boef boeo boer bofa bofd bofe boff boka boke boko boob bood booe boof book boor bor- bora bord bore borf bork boro borr brab brad brae braf brak brao brda brdo brea breb bred bree bref 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 dafa dafe daff dafo daka dake dako dara darb dard dare darf dark daro darr dbar dbfo dddd ddre dead deae deaf deak dear deba debe deda dedd dede dedo deeb deed deef deek deer defe deff defo dek- deka deke deor der- dera derb dere derf derk dero derr dfaf dfer dffa dfoe dfrf dkba doab doae doak doar doba dobb dobe dod- doda dodd dode dodo doea doek doer doff doka doke doko doob dood doof dook door dora dord dore dorf dork doro dorr draa drab drad draf drak drar drba drda drea dred dree dref drek drob drod drof drra eaaf eaba eada eadb eadd eafb eara earb eard eare earo ebba ebbo ebbr ebed eber eboe eboo ebor ebro edad edar edda edde eddo ede- edea eder edfa edod edra eede eeea eeee eefa eefe eeka eeke eera eero efab efbr efda efeo effa efke efor eka- ekab ekeb eked ekek eker ekka ekoa eode eoka eora eore erad eraf erba erbb erbe erda erde erdf ereb ered erer erke erob erod eroe eroo erra erre erro f--k faaa faad faba fabd