-er b-p bbb bbe bbf bbk bbo bbp bbr bbs be- beb bee bef bek beo bep ber bes bfb bfe bff bfo bfp bfr bfs bkb bke bkf bkk bko bkp bkr bks bob boe bof bok boo bop bor bos bpb bpe bpf bpo bpp bpr bps brb bre brf brk bro brp brr brs bsb bse bsf bsk bso bsp bsr bss ebb ebe ebf ebk ebo ebp ebr ebs eeb eee eef eek eeo eep eer ees ef- efb efe eff efo efp efr efs ekb eke ekf eko ekp ekr eks eo- eob eoe eof eok eoo eop eor eos ep- epb epe epf epo epp epr eps erb ere erf erk ero erp err ers es- esb ese esf esk eso esp esr ess fbb fbe fbf fbk fbo fbp fbr fbs feb fee fef fek feo fep fer fes ffe fff ffk ffo ffp ffr ffs fkb fkf fkk fkp fob foe fof fok foo fop for fos fpb fpe fpk fpo fpp fpr fps frb fre frf frk fro frp frr frs fsb fse fsf fsk fso fsp fsr fss kbb kbe kbf kbk kbo kbp kbr kbs ke- keb kee kef kek keo kep ker kes kff kfo kfs kkb kke kkk kkp kkr kks kob koe kof kok koo kop kor kos kpe kpf kpk kpo kpp kpr kps krf krk kro krp krr krs ksb kse ksf ksk kso ksp ksr kss ob- obb obe obf obk obo obp obr obs oeb oee oef oeo oep oer oes of- ofb ofe off ofo ofp ofr ofs okb oke okk oko okp okr oks oo- oob oof ook ooo oop oor oos op- opb ope opf opk opo opp opr ops or- orb ore orf ork oro orp orr ors os- osb ose osf osk oso osp osr oss p-p pbb pbe pbf pbk pbo pbp pbr pbs peb pee pef pek peo pep per pes pfb pfe pff pfk pfo pfp pfr pfs pkb pke pkf pko pkp pkr pks pob poe pof pok poo pop por pos ppb ppe ppf ppk ppo ppp ppr pps prb pre prf prk pro prp prr prs ps- psb pse psf psk pso psp psr pss rbb rbe rbf rbk rbo rbp rbr rbs re- reb ree ref rek reo rep rer res rfb rfe rff rfk rfo rfp rfr rfs rkb rke rkf rkk rko rkp rks rob roe rof rok roo rop ror ros rpb rpe rpf rpk rpo rpp rpr rps rrb rrf rrk rrp rrr rrs rsb rse rsf rsk rso rsp rsr rss sbb sbe sbf sbk sbo sbp sbr sbs se- seb see sef sek seo sep ser ses sfb sfe sff sfk sfo sfp sfr sfs sk- skb ske skf skk sko skp skr sks sob soe sof sok soo sop sor sos spb spe spf spk spo spp spr sps sr- srb sre srf srk sro srp srr srs ss- ssb sse ssf ssk sso ssp ssr sss

-ose bbbb bbbs bbeb bbpr bebb bebe bebo beeb beef beek beep beer bees befe beff befo beke beko beks beo- beof beok beor beos bepo bere berk bero berr bers bes- bese besk beso bess bffs bfpo bfpp bfsr bkpr bksp bobb bobe bobo bobs boee boef boeo boep boer boes bofe boff bofs boke boko boks boob booe boof book boop boor boos bope bopp bops bor- bore borf bork boro borr bors bose bosk boso boss bpoe breb bree bref brek breo brep brer bres brkb brob broe brok broo bror bros brrr brrs brsb brsr bseb bsee bser bses bsff bsfs bsos bspp bspr bsse ebbo ebbr ebbs eber ebes eboe eboo ebor ebos ebpo ebro eeee eees eefe eeke eeks eeps eero eers eese eesk efbr efeo efes effs efke efor ekeb ekek eker ekes ekos ekpe ekpo eoes eore epee eper epes epor epos eppo eppp epps eprb epro eprp eprs epsf epsp epss erbb erbe ereb erer eres erfs erke erks erob eroe eroo eros erpe erps erre erro errs erse erso esbo esbs esee esek eseo eser eses esfp esfs eske esko esks eso- esok esop esos espe espo espp esps esse esso essp f--k fbop fbrs febo febs feeb feek feer fees fefe feff fefo feke feko feof feps ferb fere ferk fero ferr fers fese fess ffee ffff ffps ffrr ffss fkbp fobs foer foes fofo foke foof fook foos fopp fops for- forb fore fork foro forr fors fosb foso foss fprf free freo frep fres frob froe frop fros frps frsb frso fsfo fspf fssf fssp k-os kbbb kbbe kbbf kbbk kbbo kbbr kbbs kbeb kbee kbef kbek kbeo kber kbes kbfb kbff kbfk kbfo kbfp kbfr kbfs kbkb kbkf kbkk kbko kbkr kbob kboe kbok kboo kbos kbpe kbpk kbpo kbpr kbps kbrb kbre kbrf kbrk kbro kbsb kbsk kbso kbsr kbss kebb kebe kebr keef keek keep keer kees kefb keff kefr kefs kekb keke keko keks keok keos kep- kepe keps ker- kerb kere kerf kerk kero kerp kerr kers kesb kesk keso kesp kesr kess kfbk kfeb kfer kffb kfff kffk kfkb kfok kfoo kfor kfpr kfre kfro kfrp kfrr kfrs kfse kfsk kfsp kfsr kkbb kkbe kkbo kkbr kkbs kkfr kkfs kkkk kkob kkoo kkor kkpk kkps kkrb kkre kkrf kkrk kkro kkrr kkrs kkse kksf kksp kksr kkss kobb kobe kobk kobo kobr kobs koes kofe koff kofk kofo kofp kokb koke kokf kokk koko kokp kokr koks koob kook kooo koop koor koos kopb kope kopf kopp kopr kops korb kore korf kork koro korr kors kos- kosb kose kosf koso kosp kosr koss kpbb kpbe kpbr kpbs kpek kper kpfk kpfr kpke kpkk kpkr kpob kpoe kpof kpok kpoo kpop kppk kppo kppp kppr kprb kpre kprf kprk kpro kprp kprr kprs kpsf kpso kpsp krbb krbe krbk krbr kreb kree kref krek kreo kres krfe krff krfo krfp krfs krke krkk krko krkr krks krob