-er b-p bbb bbc bbe bbk bbp bbr bbs bbt bcb bcc bce bck bcp bcr bcs bct be- beb bec bee bek bep ber bes bet bkb bkc bke bkk bkp bkr bks bkt bpb bpc bpe bpp bpr bps bpt brb bre brk brp brr brs brt bsb bsc bse bsk bsp bsr bss bst btb btc bte btk btp btr bts btt c-- cbb cbc cbe cbk cbp cbr cbs cbt ccb ccc cce cck ccp ccr ccs cct ce- ceb cec cee cek cep cer ces cet ckb ckc cks ckt cpb cpc cpe cpk cpp cpr cps cpt crb crc cre crk crp crr crs crt csb csc cse csk csp csr css cst ctb ctc cte ctk ctp ctr cts ctt ebb ebc ebe ebk ebp ebr ebs ebt ec- ecb ecc ece eck ecr ecs ect eeb eec eee eek eep eer ees eet ekb ekc eke ekp ekr eks ekt ep- epb epc epe epp epr eps ept erb erc ere erk erp err ers ert es- esb esc ese esk esp esr ess est etb etc ete etk etp etr ets ett k-t kbb kbc kbe kbk kbp kbr kbs kcb kcc kce kck kcp kcr kcs kct ke- keb kec kee kek kep ker kes ket kkb kkc kke kkk kkp kkr kks kkt kpc kpe kpk kpp kpr kps kpt krc krk krp krr krs krt ksb ksc kse ksk ksp ksr kss kst ktb ktc kte ktk ktp ktr kts ktt p-p pbb pbc pbe pbk pbp pbr pbs pbt pcb pcc pce pck pcp pcr pcs pct peb pec pee pek pep per pes pet pkb pkc pke pkp pkr pks pkt ppb ppc ppe ppk ppp ppr pps ppt prb prc pre prk prp prr prs prt ps- psb psc pse psk psp psr pss pst pt- ptb ptc pte ptk ptp ptr pts ptt rbb rbc rbe rbk rbp rbr rbs rbt rcb rcc rce rcp rcr rcs rct re- reb rec ree rek rep rer res ret rkb rkc rke rkk rkp rks rkt rpb rpc rpe rpk rpp rpr rps rpt rrb rrc rrk rrp rrr rrs rrt rsb rsc rse rsk rsp rsr rss rst rtb rtc rte rtk rtp rtr rts rtt sbb sbc sbe sbk sbp sbr sbs sbt scb scc sce sck scp scr scs sct se- seb sec see sek sep ser ses set sk- skb skc ske skk skp skr sks skt spb spc spe spk spp spr sps spt sr- srb src sre srk srp srr srs srt ss- ssb ssc sse ssk ssp ssr sss sst stb stc ste stk stp str sts stt tbb tbc tbe tbk tbp tbr tbs tbt tcb tcc tce tck tcp tcr tcs tct te- teb tec tee tek tep ter tes tet tkb tkc tke tkk tkp tkr tks tkt tpb tpc tpe tpk tpp tpr tps tpt trb trc tre trk trp trr trs trt tsb tsc tse tsk tsp tsr tss tst ttb ttc tte ttk ttp ttr tts ttt

bbbb bbbs bbeb bbet bbpr bbrc bcbc bcbp bcbs bccc bccs bcec bcer bces bcet bcpp bcps bcrs bcsc bcss bctc bcts bebb bebe beck becs beeb beek beep beer bees beet beke beks berc bere berk berr bers bert bes- bese besk bess best betc bete bets bett bkpr bkpt bksp bpcp bprc brcb brce breb brec bree brek brep brer bres bret brkb brrr brrs brsb brsr brst brtc bscp bscs bseb bsec bsee bser bses bset bskt bspp bspr bssc bsse bsts btbp btcc btcs btec btek btps btrc btrt btss bttb cbbc cbbs cbcc cbce cbcp cbcr cbcs cbct cbec cbee cber cbet cbkr cbpc cbpp cbre cbrt cbsc cbse cbtc ccbc cccb cccc cccp cccs ccee ccpe ccpp ccpr ccps ccrc ccre ccrp ccrs ccrt ccsp ccss ccst cctb cctc cctt cebp cebs cec- cece cecp cecs cect ceeb ceec cees ceke cepc cepe cepp cepr ceps cept cer- cerc cere cerp cers cert cesc cese cesp cesr cess cest cet- cete cetp cets ckbc ckbe ckck ckcs cker ckpc ckpr ckrc cksb ckst cktb ckts cpbc cpce cpcs cpeb cpep cper cpps cpre cprs cprt cpsc cpsk cpsr cptp cptr cpts crbc crcc crce crcr cre- creb crec cree crep cres cret crkc crkp crpc crps crrt crsp crss crst crtc crtp crts cscb cscc csce cscr cscs csec csee csep cser cset csks cspb cspc cspe csps cspt csrc csrs csse cssr cstc cstr csts ctbs ctcp ctec ctep ctpp ctps ctrc ctrp ctrs ctsc ctss ctts ebbc ebbr ebbs ebcc eber ebes ecbc ecbe eccb eccc ecce ecct eces ecks ecpp ecrc ecrr ecsc ecse ecsp ecss ect- ectc ects eecs eeee eees eeke eeks eeps eerc eers eese eesk eetc eete eets ekeb ekek eker ekes eket ekpe epcc epec epee eper epes eppc eppp epps eprb eprp eprs epsc epsp epss epte erbb erbe ercc erce ercp ereb erec erer eres eret erke erks erpe erps errc erre errs erse erst erts esbs escb esce escr escs esee esek eser eses eset eske esks espc espe espp esps esse essp esst estc este estp estr ests etbc etbr etcc etcs etec etee eter etes etre ette kbbb kbbc kbbe kbbk kbbr kbbs kbbt kbcb kbce kbck kbcr kbcs kbct kbeb kbec kbee kbek kber kbes kbet kbkb kbkk kbkr kbpc kbpe kbpk kbpr kbps kbpt kbrb kbrc kbre kbrk kbrt kbsb kbsk kbsr kbss kbst kbtb kbtc kbte kbtk kbtr kbts kbtt kcbc kcbk kcbr kcbs kccb kccc kcck kccr kcct kceb kcec kcee kcep kcet kckc kckk kckr kcpc kcpr kcps kcpt kcrc kcrp kcrr kcrs kcrt kcsb kcsc kcse kcsp kcsr kcss kcst kctb kctc kcte kebb kebc kebe kebr kebt keck kecr keek keep keer kees keet kekb kekc keke keks kep- kepc kepe keps kept ker- kerb kerc kere kerk kerp kerr kers kert kesb kesc kesk kesp kesr kess kest ket-