-er -ey b-p bbb bbc bbe bbk bbp bbr bbs bby bcb bcc bce bck bcp bcr bcs bcy be- beb bec bee bek bep ber bes bey bkb bkc bke bkk bkp bkr bks bpb bpc bpe bpp bpr bps bpy brb bre brk brp brr brs bry bsb bsc bse bsk bsp bsr bss bsy by- byc bye byk byp byr bys c-- cbb cbc cbe cbk cbp cbr cbs cby ccb ccc cce cck ccp ccr ccs ce- ceb cec cee cek cep cer ces cey ckb ckc cks cky cpb cpc cpe cpk cpp cpr cps crb crc cre crk crp crr crs cry csb csc cse csk csp csr css csy cyb cyc cye cyk cyp cyr cys ebb ebc ebe ebk ebp ebr ebs eby ec- ecb ecc ece eck ecr ecs eeb eec eee eek eep eer ees eey ekb ekc eke ekp ekr eks eky ep- epb epc epe epp epr eps erb erc ere erk erp err ers ery es- esb esc ese esk esp esr ess esy eyc eye eyp eyr eys kbb kbc kbe kbk kbp kbr kbs kcb kcc kce kck kcp kcr kcs ke- keb kec kee kek kep ker kes key kkb kkc kke kkk kkp kkr kks kky kpc kpe kpk kpp kpr kps krc krk krp krr krs kry ksb ksc kse ksk ksp ksr kss kyc kye kyp kyr kys p-p pbb pbc pbe pbk pbp pbr pbs pby pcb pcc pce pck pcp pcr pcs peb pec pee pek pep per pes pey pkb pkc pke pkp pkr pks pky ppb ppc ppe ppk ppp ppr pps prb prc pre prk prp prr prs pry ps- psb psc pse psk psp psr pss psy py- pyb pyc pye pyk pyr pys rbb rbc rbe rbk rbp rbr rbs rcb rcc rce rcp rcr rcs re- reb rec ree rek rep rer res rey rkb rkc rke rkk rkp rks rky rpb rpc rpe rpk rpp rpr rps rrb rrc rrk rrp rrr rrs rsb rsc rse rsk rsp rsr rss ry- ryc rye ryk ryr rys ryy sbb sbc sbe sbk sbp sbr sbs sby scb scc sce sck scp scr scs se- seb sec see sek sep ser ses sey sk- skb skc ske skk skp skr sks sky spb spc spe spk spp spr sps spy sr- srb src sre srk srp srr srs sry ss- ssb ssc sse ssk ssp ssr sss sy- syb syc sye syk syp syr sys ybc ybe ybp ybr ybs yby ycc yce ycp ycs ycy yeb yec yee yek yep yer yes yey ykk yps yrc yre yrp yrs ysb ysc yse ysk ysp ysr yss ysy yyb yyc yye yys yyy