-er a-a a-b aaa aab aad aae aao aar aau ab- aba abb abd abe abo abr abu ad- ada adb add ade ado adr adu aea aeb aed aee aeo aer aeu aoa aob aod aoe aoo aor aou ar- ara arb ard are aro arr aru au- aua aub aud aue auo aur b-u baa bab bad bae bao bar bau bba bbb bbd bbe bbo bbr bbu bda bdb bdd bde bdo bdr bdu be- bea beb bed bee beo ber beu boa bob bod boe boo bor bou bra brb brd bre bro brr bru bua bub bud bue buo bur buu daa dab dad dae dao dar dau dba dbb dbd dbe dbo dbr dbu dda ddb ddd dde ddo ddr ddu de- dea deb ded dee deo der deu doa dob dod doe doo dor dou dra drb drd dre dro drr dru dua dub dud due duo dur eaa eab ead eae eao ear eau eba ebb ebd ebe ebo ebr ebu ed- eda edb edd ede edo edr edu eea eeb eed eee eeo eer eo- eoa eob eod eoe eoo eor eou era erb erd ere ero err eru eu- eua eub eud eue eur oaa oab oad oae oao oar oau ob- oba obb obd obe obo obr obu oda odb odd ode odo odr odu oea oeb oed oee oeo oer oo- ooa oob ood ooo oor or- ora orb ord ore oro orr oru ou- oua oud oue ouo our ra- raa rab rad rae rao rar rau rba rbb rbd rbe rbo rbr rbu rda rdb rdd rde rdo rdr rdu re- rea reb red ree reo rer reu roa rob rod roe roo ror rou rra rrb rrd rrr rru rua rub rud rue ruo rur ruu ua- uaa uab uad uae uao uar uau uba ubb ube ubo ubr ubu uda udb udd ude udo udr udu uea ueb ued uee uer uoa uob uod uoe uoo uor ur- ura urb urd ure uro urr uru uua uue uur uuu

a-be a-do aaaa aaab aaad aaae aaar aaba aabb aabd aada aade aadu aaea aaoe aaoo aara aard aare aaro aaru abaa abab abad abae abar abau abb- abba abbb abbe abbo abbr abda abdo abdu abed abee aber aboa abob abod aboo abor abou abra abro abua abud abue adaa adab adad adae adao adar adba adda addd adde addo addr addu adea adeb adee adeo ader adob adod adoe adoo ador adra adre adro adua adub adue adur aede aeer aer- aera aerd aero aoba aoeu aora aorb arab arad arae arar arau arba arbe arda arde ardo ardu area ared aree areo areu aroa arob arod aroe aroo aror arr- arra arre arro arrr arru arua arub arud arue auaa aube aude audo auer aur- aura aurd aure auro baaa baad baar baba babb babe babo babr babu bada badb badd bade bado badr badu baed baer bar- bara barb bard bare baro barr baru bau- baud baur bbad bbau bbbb bbdd bbdo bbeb bd-r bead bear beau beba bebb bebe bebo beda bede bedo bedu beeb beed beer beo- beod beor bera berd bere bero berr beru beur boab boad boar boba bobb bobe bobo bobu boda bodb bode bodo bodu boea boee boeo boer boob bood booe boor bor- bora bord bore boro borr boru boua boud boue bour brab brad brae brao brau brda brdo brea breb bred bree breo brer broa brob brod broe broo bror brou brrr brud brue buad buar buba bubb bube bubo bubu buda budb budd bude budo budu buea buer bueu bur- bura burb burd bure buro burr buru d-bo daab daad daae daar daau daba dabb dabo dabu dada dade dado dadu daeb daer daeu daou dara darb dard dare daro darr daru daub daud daue daur dbar dddd ddre ddub dead deae dear deau deba debe debu deda dedd dede dedo dedu deeb deed deer deor der- dera derb dere dero derr deua deue deur doab doae doar doba dobb dobe dobu dod- doda dodd dode dodo doea doer doob dood door dora dord dore doro dorr doru doub doud doue dour draa drab drad drar drau drba drda drea dred dree drob drod drou drra drua drub drue druu duaa duab duad duar dub- duba dubb dube dubu duda dudd dude dudo dudu duer duo- dura dure duro duru duur eaba eada eadb eadd eara earb eard eare earo ebba ebbo ebbr ebed eber eboe eboo ebor ebro ebru ebur edad edar edda edde eddo ede- edea eder edod edou edra edru edur eede eedu eeea eeee eera eero eode eora eore erad erau erba erbb erbe erda erde ereb ered erer erob erod eroe eroo erra erre erro erua erub erur euba eude euer eur- eura eure euro o-eo oaau oade oaer oara oare obad obba obbo obea obed ober oboe obor obra obre obro odbo odda oddd odea oded odeo oder odoo odor odou odra odur oedo oera oere ooaa ooba oobe ooda ooer oooo oora oord oore orab orad orae orao orar orba orbb orbe orbo orbu orda orde ordo ordu ore- orea oreb ored oreo orer oro- oroe oror orra orro orub ouad oude ouea oued ouer our- oura oure ouro ouu- raab raad raba rabb rabe rabo rabu rada radd rade rado radr radu raed raer raob rara rarb rare raro raua raub raud raue rbbb rbbr rder rea- read reae reao rear reau reba rebb rebe rebo rebu reda redd rede redo redr redu reeb reed reod reou rera rerd rere rero reru reue reuu roab road roar rob- roba robb robe robo robu roda rodd rode rodo roea roed roer roob rood roor rora rore roro roru roua roub roud roue rrad rred rrrr ruad ruba rubb rube rubu ruda rudd rude rudo rued ruer rura rurd rure ruro ruru ruud uaru uaua ubar ubba ubbe ubbo uber ubod ubra ubud udaa udad