-er a-a a-b a-t aaa aab aae aak aao aar aat ab- aba abb abe abk abo abr abt aea aeb aee aek aeo aer aet aka akb ake akk ako akr aoa aob aoe aok aoo aor aot ar- ara arb are ark aro arr art at- ata atb ate ato atr att baa bab bae bak bao bar bat bba bbb bbe bbk bbo bbr bbt be- bea beb bee bek beo ber bet bka bkb bke bkk bko bkr bkt boa bob boe bok boo bor bot bra brb bre brk bro brr brt bta btb bte btk bto btr btt eaa eab eae eak eao ear eat eba ebb ebe ebk ebo ebr ebt eea eeb eee eek eeo eer eet eka ekb eke eko ekr ekt eo- eoa eob eoe eok eoo eor eot era erb ere erk ero err ert eta etb ete etk eto etr ett k-t ka- kaa kab kae kak kao kar kat kba kbb kbe kbk kbo kbr ke- kea keb kee kek keo ker ket kkb kke kkk kkr kkt koa kob koe kok koo kor kot kra krk kro krr krt kta ktb kte ktk kto ktr ktt oaa oab oae oak oao oar oat ob- oba obb obe obk obo obr obt oea oeb oee oeo oer oet oka okb oke okk oko okr oo- ooa oob ook ooo oor oot or- ora orb ore ork oro orr ort ot- ota otb ote otk oto otr ott ra- raa rab rae rak rao rar rat rba rbb rbe rbk rbo rbr rbt re- rea reb ree rek reo rer ret rkb rke rkk rko rkt roa rob roe rok roo ror rot rra rrb rrk rrr rrt rta rtb rte rtk rto rtr rtt taa tab tae tak tao tar tat tba tbb tbe tbk tbo tbr tbt te- tea teb tee tek teo ter tet tka tkb tke tkk tko tkr tkt to- toa tob toe tok too tor tot tra trb tre trk tro trr trt tta ttb tte ttk tto ttr ttt

a-ak a-be a-ok aaaa aaab aaae aaar aaba aabb aabt aaea aaka aake aaoe aaoo aara aare aaro aart aata aatk aatt abaa abab abae abak abar abat abb- abba abbb abbe abbo abbr abbt abee aber abet aboa abob abok aboo abor abot abra abro abta aeer aeka aer- aera aero aeta aeto aetr aett akaa akae akao akar akee aker akka akko akok akot akr- akra akre akte aoba aora aorb aort arab arae arak arar arat arba arbe area aree arek areo aret arka arke arko aroa arob aroe aroo aror arr- arra arre arrk arro arrr arrt arta arte arto artr at-t ataa atab atae atak atar atat atea atee ateo ater atka atkt atob atoe atok ator atot atra atre atrk atro atta atte atto attr baaa baak baar baat baba babb babe babo babr baek baer bak- baka bake bako bakr bakt bar- bara barb bare bark baro barr bart bata bate bato batt bbbb bbeb bbet beak bear beat beba bebb bebe bebo beeb beek beer beet beka beke beko beo- beok beor beot bera bere berk bero berr bert beta bete beto bett boab boak boar boat boba bobb bobe bobo boea boee boeo boer boet boka boke boko boob booe book boor boot bor- bora bore bork boro borr bort bota botb bote boto bott brab brae brak brao brat brea breb bree brek breo brer bret brka brkb broa brob broe brok broo bror brot brrr btaa btek btob btor btrt bttb eaba eara earb eare earo eart eata eate ebba ebbo ebbr eber eboe eboo ebor ebro eeea eeee eeka eeke eera eero eeta eete eka- ekab ekeb ekek eker eket ekka ekoa ekta eoka eora eore eota eoto erat erba erbb erbe ereb erer eret erke erob eroe eroo erra erre erro erta etak etat etbr etee eter etka etoe etok etra etre etro etta ette etto kaaa kaab kaak kaar kaat kaba kabb kabe kabo kabr kaeo kaer kaet kaka kake kakk kako kakt kaoa kaok kaor kara karb kare kark karo karr kart kat- kata katb kate katk kato katr katt kbaa kbab kbae kbak kbar kbat kbba kbbb kbbe kbbk kbbo kbbr kbbt kbeb kbee kbek kbeo kber kbet kbkb kbkk kbko kbkr kboa kbob kboe kbok kboo kbot kbra kbrb kbre kbrk kbro kbrt kbta kbtb kbte kbtk kbto kbtr kbtt kea- keak kear keat keba kebb kebe kebr kebt keek keer keet keka kekb keke keko keok ker- kera kerb kere kerk kero kerr kert ket- keta kete ketk keto ketr kett kkaa kkar kkat kkba kkbb kkbe kkbo kkbr kkbt kkea kkkk kkoa kkob kkoo kkor kkot kkrb kkre kkrk kkro kkrr kkrt kktk koab koae koak koar koba kobb kobe kobk kobo kobr koea koka kokb koke kokk koko kokr koob kook kooo koor koot kora korb kore kork koro korr kort kota kotb kote kotk koto kotr kott krab krae krak krar krat krba krbb krbe krbk krbr krbt krea kreb kree krek kreo kret krka krke krkk krko krkr kroa krob kroe krok kroo kror krrb krre krrk krro krrr krrt krta krtk krto krtr ktaa ktae ktak ktao ktar ktat ktba ktbb ktbr ktbt ktea ktee ktek ktkb ktke ktkk ktko ktkr ktkt ktob ktoe ktok ktoo ktor ktot ktrb ktre ktrk ktro ktrr ktrt kttk ktto kttr kttt o-eo oaer oake oara oare oate obak obba obbo obea ober obet obkb oboe obok obor obot obra obre obro oera oere oeta okak oker oket okka okko okok okor okot okra okre okro okta okto ooaa ooak ooba oobe ooer oooo oora oore oort ootb orab orae orak orao orar orat orba orbb orbe orbo ore- orea oreb orek oreo orer orka orke orko oro- oroe orok oror orot orra orro orta orte orto otak otar otea otee oter oto- otoe otok otoo otor otra otre otro otta otte otto