-er a-a a-b a-t aaa aab aae aak aao aap aar aat ab- aba abb abe abk abo abp abr abt aea aeb aee aek aeo aep aer aet aka akb ake akk ako akp akr aoa aob aoe aok aoo aop aor aot ap- apa apb ape apk apo app apr apt ar- ara arb are ark aro arp arr art at- ata atb ate ato atp atr att b-p baa bab bae bak bao bap bar bat bba bbb bbe bbk bbo bbp bbr bbt be- bea beb bee bek beo bep ber bet bka bkb bke bkk bko bkp bkr bkt boa bob boe bok boo bop bor bot bpa bpb bpe bpo bpp bpr bpt bra brb bre brk bro brp brr brt bta btb bte btk bto btp btr btt eaa eab eae eak eao eap ear eat eba ebb ebe ebk ebo ebp ebr ebt eea eeb eee eek eeo eep eer eet eka ekb eke eko ekp ekr ekt eo- eoa eob eoe eok eoo eop eor eot ep- epa epb epe epo epp epr ept era erb ere erk ero erp err ert eta etb ete etk eto etp etr ett k-t ka- kaa kab kae kak kao kap kar kat kba kbb kbe kbk kbo kbp kbr ke- kea keb kee kek keo kep ker ket kkb kke kkk kkp kkr kkt koa kob koe kok koo kop kor kot kpa kpe kpk kpo kpp kpr kpt kra krk kro krp krr krt kta ktb kte ktk kto ktp ktr ktt oaa oab oae oak oao oap oar oat ob- oba obb obe obk obo obp obr obt oea oeb oee oeo oep oer oet oka okb oke okk oko okp okr oo- ooa oob ook ooo oop oor oot op- opa opb ope opk opo opp opr opt or- ora orb ore ork oro orp orr ort ot- ota otb ote otk oto otp otr ott p-p paa pab pae pak pao pap par pat pba pbb pbe pbk pbo pbp pbr pbt pea peb pee pek peo pep per pet pka pkb pke pko pkp pkr pkt poa pob poe pok poo pop por pot ppa ppb ppe ppk ppo ppp ppr ppt pra prb pre prk pro prp prr prt pt- pta ptb pte ptk pto ptp ptr ptt ra- raa rab rae rak rao rap rar rat rba rbb rbe rbk rbo rbp rbr rbt re- rea reb ree rek reo rep rer ret rkb rke rkk rko rkp rkt roa rob roe rok roo rop ror rot rpa rpb rpe rpk rpo rpp rpr rpt rra rrb rrk rrp rrr rrt rta rtb rte rtk rto rtp rtr rtt taa tab tae tak tao tap tar tat tba tbb tbe tbk tbo tbp tbr tbt te- tea teb tee tek teo tep ter tet tka tkb tke tkk tko tkp tkr tkt to- toa tob toe tok too top tor tot tpa tpb tpe tpk tpo tpp tpr tpt tra trb tre trk tro trp trr trt tta ttb tte ttk tto ttp ttr ttt

a-ak a-be a-ok aaaa aaab aaae aaap aaar aaba aabb aabp aabt aaea aaep aaka aake aaoe aaoo aapa aapo aapt aara aare aaro aarp aart aata aatk aatt abaa abab abae abak abap abar abat abb- abba abbb abbe abbo abbr abbt abee aber abet aboa abob abok aboo abor abot abpa abpp abpr abra abro abta aeap aeer aeka aer- aera aero aeta aeto aetr aett akaa akae akao akap akar akee aker akka akko akok akot akpo akr- akra akre akte aoba aokp aopo aora aorb aort apak apao apap apar apat apba apbr apea apep aper apet apke apo- apoe apoo apop apor apot appa appr appt apra apre apro aprt apta apte aptt arab arae arak arap arar arat arba arbe area aree arek areo arep aret arka arke arko aroa arob aroe aroo aror arpa arpe arr- arra arre arrk arro arrr arrt arta arte arto artr at-t ataa atab atae atak atap atar atat atea atee ateo atep ater atka atkt atob atoe atok atop ator atot atpr atra atre atrk atro atrp atta atte atto attp attr baaa baak baar baat baba babb babe babo babr baek baer bak- baka bake bako bakr bakt bapa bape bapp bapt bar- bara barb bare bark baro barr bart bata bate bato batt bbbb bbeb bbet bbpr beak beap bear beat beba bebb bebe bebo beeb beek beep beer beet beka beke beko beo- beok beor beot bepo bera bere berk bero berr bert beta bete beto bett bkpr bkpt boab boak boar boat boba bobb bobe bobo boea boee boeo boep boer boet boka boke boko boob booe book boop boor boot bopa bope bopp bor- bora bore bork boro borr bort bota botb bote boto bott bpea bpoe bpot brab brae brak brao brat brea breb bree brek breo brep brer bret brka brkb broa brob broe brok broo bror brot brrr btaa btbp btek btob btor btrt bttb eaba eaop eapp eara earb eare earo earp eart eata eate ebba ebbo ebbr eber eboe eboo ebor ebpo ebro eeea eeee eeka eeke eera eero eeta eete eka- ekab ekeb ekek eker eket ekka ekoa ekpe ekpo ekta eoka eora eore eota eoto epaa epee eper epor epot eppa eppo eppp epra eprb epro eprp epta epte erap erat erba erbb erbe ereb erer eret erke erob eroe eroo erpa erpe erra erre erro erta etak etap etat etbr etee eter etka etoe etok etra etre etro etta ette etto kaaa kaab kaak kaap kaar kaat kaba kabb kabe kabo kabr kaeo kaep kaer kaet kaka kake kakk kako kakt kaoa kaok kaor kap- kapa kape kapo kapp kapt kara karb kare kark karo karp karr kart kat- kata katb kate katk kato katp katr katt kbaa kbab kbae kbak kbap kbar kbat kbba kbbb kbbe kbbk kbbo kbbr kbbt kbeb kbee kbek kbeo