-er a-a a-b a-i aaa aab aae aai aak aao aar ab- aba abb abe abi abk abo abr aea aeb aee aei aek aeo aer ai- aia aib aie aii aik aio air aka akb ake aki akk ako akr aoa aob aoe aoi aok aoo aor ar- ara arb are ari ark aro arr baa bab bae bai bak bao bar bba bbb bbe bbi bbk bbo bbr be- bea beb bee bei bek beo ber bi- bia bib bie bii bik bio bir bka bkb bke bkk bko bkr boa bob boe boi bok boo bor bra brb bre bri brk bro brr eaa eab eae eai eak eao ear eba ebb ebe ebi ebk ebo ebr eea eeb eee eek eeo eer eia eib eie eii eik eio eir eka ekb eke eki eko ekr eo- eoa eob eoe eoi eok eoo eor era erb ere eri erk ero err ia- iaa iab iae iai iao iar iba ibb ibe ibi ibk ibo ibr ie- iea iee iei iek ier iia iib iie iii iio iir ika ikb ike iki ikk iko ikr io- ioa iob ioe ioi ioo ior ir- ira irb ire iri irk iro irr ka- kaa kab kae kai kak kao kar kba kbb kbe kbi kbk kbo kbr ke- kea keb kee kei kek keo ker kia kib kie kii kik kio kir kkb kke kki kkk kkr koa kob koe koi kok koo kor kra kri krk kro krr o-i oaa oab oae oai oak oao oar ob- oba obb obe obi obk obo obr oea oeb oee oei oeo oer oia oib oie oii oik oio oir oka okb oke oki okk oko okr oo- ooa oob ooi ook ooo oor or- ora orb ore ori ork oro orr ra- raa rab rae rai rak rao rar rba rbb rbe rbi rbk rbo rbr re- rea reb ree rei rek reo rer ria rib rie rii rik rio rir rkb rke rkk rko roa rob roe roi rok roo ror rra rrb rri rrk rrr

a-ak a-be a-ii a-ok aaaa aaab aaae aaai aaar aaba aabb aabi aaea aaib aaii aaka aake aaoe aaoo aara aare aari aaro abaa abab abae abai abak abar abb- abba abbb abbe abbi abbo abbr abee aber abia abib abie abir aboa abob abok aboo abor abra abri abro aebi aeer aeio aeka aer- aera aeri aero aiai aiba aibo aiea aiee aiia aiib aiir aika aike aiki aiko aioi aira aire airi airo akaa akae akai akao akar akee aker akia akie akik akio akir akka akki akko akok akr- akra akre aoba aoki aora aorb arab arae arai arak arar arba arbe arbi area aree arei arek areo aria arib arie arii arik ario arka arke arki arko aroa arob aroe aroi aroo aror arr- arra arre arri arrk arro arrr ba-i baaa baak baar baba babb babe babi babo babr baek baer baia baib baie baik baio bair bak- baka bake baki bako bakr bar- bara barb bare bari bark baro barr bbbb bbeb beak bear beba bebb bebe bebi bebo beeb beek beer beia beik beir beka beke beki beko beo- beok beor bera bere beri berk bero berr biak biao biar biba bibb bibe bibi bibo bieb bier bike biko bio- bioi bira birb bire biri birk biro birr boab boai boak boar boba bobb bobe bobi bobo boea boee boeo boer boi- boie boii boka boke boki boko boob booe book boor bor- bora bore bori bork boro borr brab brae brai brak brao brea breb bree brei brek breo brer bria brie brik brio brka brkb broa brob broe brok broo bror brrr eaba eara earb eare earo ebba ebbo ebbr eber eboe eboo ebor ebro eeea eeee eeka eeke eera eero eiao eiei eier eika eike eiki eiko eira eire eka- ekab ekeb ekek eker ekka ekki ekoa ekoi eoir eoka eora eore eori erba erbb erbe ereb erei erer eria erie erik erio erke erki erob eroe eroi eroo erra erre erro i-be iaaa iaai iaba iaea iaia iara iare ibar ibea ibia ibie ibra ibri ibro ieie ieio iera iere ieri iiie iiii iiio iioi iioo iira ikar ikea ikee iker ikki ikko ikoo ikra ikri ioba iobi ioee ioii ioio ioke ioko iooi iooo iora iore iori irae irai irak irao irar irbe iree irer iri- iria irie irio irka irki irob irra irre irri kaaa kaab kaai kaak kaar kaba kabb kabe kabi kabo kabr kaei kaeo kaer kaia kaib kaie kaii kaik kaio kair kaka kake kaki kakk kako kaoa kaoi kaok kaor kara karb kare kari kark karo karr kbaa kbab kbae kbai kbak kbar kbba kbbb kbbe kbbi kbbk kbbo kbbr kbeb kbee kbek kbeo kber kbia kbib kbie kbik kbio kbkb kbkk kbko kbkr kboa kbob kboe kboi kbok kboo kbra kbrb kbre kbri kbrk kbro kea- keak kear keba kebb kebe kebi kebr keek keer keib keii keik keio keir keka kekb keke keki keko keok ker- kera kerb kere keri kerk kero kerr kiab kiai kiar kiba kibb kibe kibi kibo kibr kier kiia kiii kiik kika kiki kikk kiko kikr kioa kioe kioi kiok kioo kira kirb kiri kirk kiro kirr kkaa kkai kkar kkba kkbb kkbe kkbi kkbo kkbr kkea kkia kkik kkkk kkoa kkob kkoo kkor kkrb kkre kkrk kkro kkrr koab koae koai koak koar koba kobb kobe kobi kobk kobo kobr koea koei koii koir koka kokb koke koki kokk koko kokr koob kooi kook kooo koor kora korb kore kori kork koro korr krab krae krai krak krar krba krbb krbe krbi krbk krbr krea kreb kree krei krek kreo kria krib krik krio krka krke krki krkk krko krkr kroa krob kroe kroi krok kroo kror krrb krre krri krrk krro krrr o-eo oaer oake oara oare obai obak obba obbo obea ober obia obie obkb oboe oboi obok obor obra obre obri obro oera oere oiba oier