-er a-a a-b aaa aab aae aaf aak aam aao aap aar ab- aba abb abe abf abk abm abo abp abr aea aeb aee aef aek aem aeo aep aer af- afa afb afe aff afk afm afo afp afr aka akb ake akk akm ako akp akr ama amb ame amf amk amm amo amp amr aoa aob aoe aof aok aom aoo aop aor ap- apa apb ape apf apk apm apo app apr ar- ara arb are arf ark arm aro arp arr b-p baa bab bae baf bak bam bao bap bar bba bbb bbe bbf bbk bbm bbo bbp bbr be- bea beb bee bef bek bem beo bep ber bfa bfb bfe bff bfm bfo bfp bfr bka bkb bke bkf bkk bkm bko bkp bkr bma bmb bme bmf bmk bmm bmo bmp bmr boa bob boe bof bok bom boo bop bor bpa bpb bpe bpf bpm bpo bpp bpr bra brb bre brf brk brm bro brp brr eaa eab eae eaf eak eam eao eap ear eba ebb ebe ebf ebk ebm ebo ebp ebr eea eeb eee eef eek eem eeo eep eer ef- efa efb efe eff efm efo efp efr eka ekb eke ekf eko ekp ekr em- ema emb eme emf emk emm emo emp emr eo- eoa eob eoe eof eok eom eoo eop eor ep- epa epb epe epf epm epo epp epr era erb ere erf erk erm ero erp err faa fab fae faf fak fam fao fap far fba fbb fbe fbf fbk fbm fbo fbp fbr fea feb fee fef fek fem feo fep fer ffa ffe fff ffk ffm ffo ffp ffr fka fkb fkf fkk fkm fkp fma fmb fme fmf fmm fmo fmp fmr foa fob foe fof fok fom foo fop for fpa fpb fpe fpk fpm fpo fpp fpr fra frb fre frf frk frm fro frp frr ka- kaa kab kae kaf kak kam kao kap kar kba kbb kbe kbf kbk kbm kbo kbp kbr ke- kea keb kee kef kek kem keo kep ker kfa kff kfm kfo kkb kke kkk kkm kkp kkr kma kmb kme kmf kmk kmm kmo kmp koa kob koe kof kok kom koo kop kor kpa kpe kpf kpk kpm kpo kpp kpr kra krf krk kro krp krr m-f m-o m-r maa mab mae maf mak mam mao map mar mba mbb mbe mbf mbk mbm mbo mbp mbr mea meb mee mef mek mem meo mep mer mfa mfb mfe mff mfm mfo mfp mfr mka mkb mke mkk mkm mko mkp mkr mma mmb mme mmf mmk mmm mmo mmp mmr moa mob moe mof mok mom moo mop mor mpa mpb mpe mpf mpk mpm mpo mpp mpr mra mrb mre mrf mrk mrm mro mrp mrr oaa oab oae oaf oak oam oao oap oar ob- oba obb obe obf obk obm obo obp obr oea oeb oee oef oem oeo oep oer of- ofa ofb ofe off ofm ofo ofp ofr oka okb oke okk oko okp okr om- oma omb ome omf omm omo omp omr oo- ooa oob oof ook oom ooo oop oor op- opa opb ope opf opk opm opo opp opr or- ora orb ore orf ork orm oro orp orr p-p paa pab pae paf pak pam pao pap par pba pbb pbe pbf pbk pbm pbo pbp pbr pea peb pee pef pek pem peo pep per pfa pfb pfe pff pfk pfm pfo pfp pfr pka pkb pke pkf pkm pko pkp pkr pma pmb pme pmf pmk pmm pmo pmp pmr poa pob poe pof pok pom poo pop por ppa ppb ppe ppf ppk ppm ppo ppp ppr pra prb pre prf prk prm pro prp prr ra- raa rab rae raf rak ram rao rap rar rba rbb rbe rbf rbk rbm rbo rbp rbr re- rea reb ree ref rek rem reo rep rer rfa rfb rfe rff rfk rfm rfo rfp rfr rkb rke rkf rkk rkm rko rkp rma rmb rme rmf rmm rmo rmp rmr roa rob roe rof rok rom roo rop ror rpa rpb rpe rpf rpk rpm rpo rpp rpr rra rrb rrf rrk rrm rrp rrr

a-ak a-be a-ok aaaa aaab aaae aaaf aaam aaap aaar aaba aabb aabm aabp aaea aaem aaep aafa aafb aaff aaka aake aama aamb aame aamo aamp aamr aaoe aaoo aapa aapm aapo aara aare aarm aaro aarp abaa abab abae abaf abak abam abap abar abb- abba abbb abbe abbo abbr abee aber abff abma abmb aboa abob abof abok aboo abor abpa abpm abpp abpr abra abro aeaf aeap aeer aeka aeom aer- aera aero afaa afak afam afao afap afar afee afek afer affa affo afka afkr afma afoa afoe afoo afor afpa afpe afpm afr- afra afre afrm afro akaa akae akam akao akap akar akee aker akka akko akok akom akpo akr- akra akre amaa amae amam amap amar amb- amba ambe ambo ambr amee amer amfm amfr amka amm- amma amme ammo amob amof amok amoo amor ampa ampe ampk ampm ampo amra amro aoba aokp aoma aopo aora aorb apak apam apao apap apar apba apbr apea apem apep aper apfa apfo apke apma apo- apoe apof apom apoo apop apor appa appr apra apre apro arab arae araf arak aram arap arar arba arbe area aree aref arek arem areo arep arfa arfb arff arka arke arko arma arme armm armo aroa arob aroe arom aroo aror arpa arpe arr- arra arre arrk arro arrr baaa baaf baak baam baar baba babb babe babm babo babr baek baer baff bafo bak- baka bake bako bakr bama bamb bame bamf bamm bamp bapa bape bapp bar- bara barb bare barf bark barm baro barr bbbb bbeb bbpr beaf beak beam beap bear beba bebb bebe bebo beeb beef beek beem beep beer befa befe beff befo beka