-er b-p bbb bbe bbk bbo bbp bbr bbs be- beb bee bek beo bep ber bes bkb bke bkk bko bkp bkr bks bob boe bok boo bop bor bos bpb bpe bpo bpp bpr bps brb bre brk bro brp brr brs bsb bse bsk bso bsp bsr bss ebb ebe ebk ebo ebp ebr ebs eeb eee eek eeo eep eer ees ekb eke eko ekp ekr eks eo- eob eoe eok eoo eop eor eos ep- epb epe epo epp epr eps erb ere erk ero erp err ers es- esb ese esk eso esp esr ess kbb kbe kbk kbo kbp kbr kbs ke- keb kee kek keo kep ker kes 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 ob- obb obe obk obo obp obr obs oeb oee oeo oep oer oes okb oke okk oko okp okr oks oo- oob ook ooo oop oor oos op- opb ope opk opo opp opr ops or- orb ore ork oro orp orr ors os- osb ose osk oso osp osr oss p-p pbb pbe pbk pbo pbp pbr pbs peb pee pek peo pep per pes pkb pke pko pkp pkr pks pob poe pok poo pop por pos ppb ppe ppk ppo ppp ppr pps prb pre prk pro prp prr prs ps- psb pse psk pso psp psr pss rbb rbe rbk rbo rbp rbr rbs re- reb ree rek reo rep rer res rkb rke rkk rko rkp rks rob roe rok roo rop ror ros rpb rpe rpk rpo rpp rpr rps rrb rrk rrp rrr rrs rsb rse rsk rso rsp rsr rss sbb sbe sbk sbo sbp sbr sbs se- seb see sek seo sep ser ses sk- skb ske skk sko skp skr sks sob soe sok soo sop sor sos spb spe spk spo spp spr sps sr- srb sre srk sro srp srr srs ss- ssb sse ssk sso ssp ssr sss

-ose bbbb bbbs bbeb 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 bope bopp bops bor- bore bork boro borr bors bose bosk boso boss bpoe breb bree brek breo brep brer bres brkb brob broe brok broo bror bros brrr brrs brsb brsr bseb bsee bser bses bsos bspp bspr bsse ebbo ebbr ebbs eber ebes eboe eboo ebor ebos 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 eppo eppp epps eprb epro eprp eprs epsp epss 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 espe espo espp esps esse esso essp k-os kbbb kbbe kbbk kbbo kbbr kbbs kbeb kbee kbek kbeo kber kbes kbkb kbkk kbko kbkr kbob kboe kbok kboo kbos kbpe kbpk kbpo kbpr kbps kbrb kbre kbrk kbro kbsb kbsk kbso kbsr kbss kebb kebe kebr keek keep keer kees kekb keke keko keks keok keos kep- kepe keps ker- kerb kere kerk kero kerp kerr kers kesb kesk keso kesp kesr kess kkbb kkbe kkbo kkbr kkbs kkkk kkob kkoo kkor kkpk kkps kkrb kkre kkrk kkro kkrr kkrs kkse kksp kksr kkss kobb kobe kobk kobo kobr kobs koes kokb koke kokk koko kokp kokr koks koob kook kooo koop koor koos kopb kope kopp kopr kops korb kore kork koro korr kors kos- kosb kose koso kosp kosr koss kpbb kpbe kpbr kpbs kpek kper kpke kpkk kpkr kpob kpoe kpok kpoo kpop kppk kppo kppp kppr kprb kpre kprk kpro kprp kprr kprs kpso kpsp krbb krbe krbk krbr kreb kree krek kreo kres krke krkk krko krkr krks krob kroe krok kroo krop kror kros krpr krps krrb krre krrk krro krrr krrs krse krsk krsr krss ksbp ksbr ksbs ksee ksek kseo ksep kser kskb kske kskk ksko kskr ksks ksob ksok ksoo ksop ksor ksos kspb kspe kspk kspo kspr ksps ksrb ksro ksrp ksrr ksrs ksse ksso kssr ksss o-eo obbo ober obes obkb oboe obok obor obos 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 opo- opor opos oppo opps orbb orbe orbo orbs ore- oreb orek oreo orer ores orke orko oro- oroe orok oror oros orpe orps orro orrs orse orsk orso osbe osbp osee osek oser oses osoo osor osos osro ossb osse osso pbpk pbrs pbsp peek peep peer pees peke pekk peko peor pepe pepo peps per- pere perk pero perp perr pers pese peso pess pobo pobs poer poes poke poko pook poop poor poos pop- pope popo popp pops porb pore pork poro porr pors posb pose posk poso poss pper ppos pppo pppp ppps ppss prbs pre- preb pree prek prep pres pro- prob proe proo prop pros prps prrs prse prso prss psbr pseb psos pspp pspr psps psrk psrp psse psso rbbb rbbr rbbs rbsp rbss rebb rebe rebk rebo rebs reeb reek reep rees reke reko reks reop reos repe repo repp repr reps rere rero rers rese reso resp ress rkos rkss rob- robb robe robo robs roer roes roke rokk roko rokr roks roob rook roop roor roos rope ropo rops rore rork roro rose roso rosp ross rpob rpoe rpos rpps rrrr rrsp rsee rsos rspb rspk rspo rsps rsre s-os sbbs sber sbor sbrk sbse sbsp se-e se-k se-o se-s sebe sebo sebs seeb seek seep seer sees seke sekk