-er b-p bbb bbe bbk bbo bbp bbr bbs bbx be- beb bee bek beo bep ber bes bex bkb bke bkk bko bkp bkr bks bkx bob boe bok boo bop bor bos box bpb bpe bpo bpp bpr bps bpx brb bre brk bro brp brr brs brx bsb bse bsk bso bsp bsr bss bsx bxb bxo bxx ebb ebe ebk ebo ebp ebr ebs ebx eeb eee eek eeo eep eer ees eex ekb eke eko ekp ekr eks eo- eob eoe eok eoo eop eor eos ep- epb epe epo epp epr eps epx erb ere erk ero erp err ers es- esb ese esk eso esp esr ess esx ex- exe exo exp exr exs exx kbb kbe kbk kbo kbp kbr kbs kbx ke- keb kee kek keo kep ker kes kex kkb kke kkk kkp kkr kks kob koe kok koo kop kor kos kpe kpk kpo kpp kpr kps krk kro krp krr krs ksb kse ksk kso ksp ksr kss kxo ob- obb obe obk obo obp obr obs obx oeb oee oeo oep oer oes oex okb oke okk oko okp okr oks oo- oob ook ooo oop oor oos oox op- opb ope opk opo opp opr ops opx or- orb ore ork oro orp orr ors orx os- osb ose osk oso osp osr oss osx ox- oxb oxo oxx p-p pbb pbe pbk pbo pbp pbr pbs pbx peb pee pek peo pep per pes pex pkb pke pko pkp pkr pks pob poe pok poo pop por pos pox ppb ppe ppk ppo ppp ppr pps ppx prb pre prk pro prp prr prs prx ps- psb pse psk pso psp psr pss psx pxe pxk pxr pxs rbb rbe rbk rbo rbp rbr rbs rbx re- reb ree rek reo rep rer res rex rkb rke rkk rko rkp rks rob roe rok roo rop ror ros rox rpb rpe rpk rpo rpp rpr rps rpx rrb rrk rrp rrr rrs rsb rse rsk rso rsp rsr rss rsx rxp rxr rxs sbb sbe sbk sbo sbp sbr sbs sbx se- seb see sek seo sep ser ses sex sk- skb ske skk sko skp skr sks skx sob soe sok soo sop sor sos sox spb spe spk spo spp spr sps spx sr- srb sre srk sro srp srr srs srx ss- ssb sse ssk sso ssp ssr sss ssx sxs xbe xbr xbx xee xep xer xes xex xkb xke xks xok xoo xop xor xos xox xpb xpe xpo xpp xps xrx xsb xsp xss xxo xxp xxx

-ose bbbb bbbs bbeb bbox bbpr bebb bebe bebo beeb beek beep beer bees beke beko beks beo- beok beor beos bepo bere berk bero berr bers bes- bese besk beso bess bkpr bksp bobb bobe bobo bobs boee boeo boep boer boes boke boko boks boob booe book boop boor boos boox bope bopp bops bor- bore bork boro borr bors bose bosk boso boss bpoe breb bree brek breo brep brer bres brex brkb brob broe brok broo bror bros brox brrr brrs brsb brsr bseb bsee bser bses bsos bspp bspr bsse ebbo ebbr ebbs eber ebes eboe eboo ebor ebos ebox ebpo ebro eeee eees eeke eeks eeps eero eers eese eesk ekeb ekek eker ekes ekos ekpe ekpo eoes eore epee eper epes epor epos epox eppo eppp epps eprb epro eprp eprs epsp epss epsx epxp er-x erbb erbe ereb erer eres erke erks erob eroe eroo eros erpe erps erre erro errs erse erso esbo esbs esee esek eseo eser eses eske esko esks eso- esok esop esos esox espe espo espp esps esse esso essp exer exes exo- exor exos expo expr exrx k-os kbbb kbbe kbbk kbbo kbbr kbbs kbeb kbee kbek kbeo kber kbes kbex kbkb kbkk kbko kbkr kbob kboe kbok kboo kbos kbox kbpe kbpk kbpo kbpr kbps kbrb kbre kbrk kbro kbrx kbsb kbsk kbso kbsr kbss kbsx kbxb kbxr kbxs kbxx kebb kebe kebr keek keep keer kees kekb keke keko keks keok keos kep- kepe keps kepx ker- kerb kere kerk kero kerp kerr kers kerx kesb kesk keso kesp kesr kess kexb kexo kexs kexx kkbb kkbe kkbo kkbr kkbs kkex kkkk kkob kkoo kkor kkpk kkps kkrb kkre kkrk kkro kkrr kkrs kkrx kkse kksp kksr kkss kkxk kkxs kkxx kobb kobe kobk kobo kobr kobs koes kokb koke kokk koko kokp kokr koks kokx koob kook kooo koop koor koos kopb kope kopp kopr kops korb kore kork koro korr kors kos- kosb kose koso kosp kosr koss koxe koxr kpbb kpbe kpbr kpbs kpbx kpek kper kpke kpkk kpkr kpkx kpob kpoe kpok kpoo kpop kppk kppo kppp kppr kprb kpre kprk kpro kprp kprr kprs kpso kpsp kpxp kpxr krbb krbe krbk krbr krbx kreb kree krek kreo kres krex krke krkk krko krkr krks krkx krob kroe krok kroo krop kror kros krox krpr krps krpx krrb krre krrk krro krrr krrs krrx krse krsk krsr krss krsx krxb krxk krxo krxp krxr krxx ksbp ksbr ksbs ksee ksek kseo ksep kser ksex kskb kske kskk ksko kskr ksks kskx ksob ksok ksoo ksop ksor ksos ksox kspb kspe kspk kspo kspr ksps ksrb ksro ksrp ksrr ksrs ksrx ksse ksso kssr ksss kssx kxbr kxbx kxeo kxex kxkk kxks kxkx kxok kxoo kxor kxos kxox kxpk kxpo kxpr kxps kxrb kxre kxrk kxro kxrp kxrr kxrs kxrx kxsb kxse kxsp kxss kxxe kxxk kxxo kxxr kxxx o-eo obbo ober obes obex obkb oboe obok obor obos obox obre obro obsr obss oeps oere oers oese oker okes okko okok okor okpe okpo okre okro okso oobe ooer ooes oooo ooos oops oore oose opep oper opes opex opo- opor opos oppo opps orbb orbe orbo orbs ore- oreb orek oreo orer ores orex orke orko oro- oroe orok oror oros orpe orps orro orrs orse orsk orso osbe osbp osee