-er -ey b-p bbb bbc bbe bbp bbr bbt bby bcb bcc bce bcp bcr bct bcy be- beb bec bee bep ber bet bey bpb bpc bpe bpp bpr bpt bpy brb bre brp brr brt bry btb btc bte btp btr btt bty by- byc bye byp byr byt c-- cbb cbc cbe cbp cbr cbt cby ccb ccc cce ccp ccr cct ce- ceb cec cee cep cer cet cey cpb cpc cpe cpp cpr cpt crb crc cre crp crr crt cry ctb ctc cte ctp ctr ctt cty cyb cyc cye cyp cyr cyt ebb ebc ebe ebp ebr ebt eby ec- ecb ecc ece ecr ect eeb eec eee eep eer eet eey ep- epb epc epe epp epr ept erb erc ere erp err ert ery etb etc ete etp etr ett ety eyc eye eyp eyr eyt p-p pbb pbc pbe pbp pbr pbt pby pcb pcc pce pcp pcr pct peb pec pee pep per pet pey ppb ppc ppe ppp ppr ppt prb prc pre prp prr prt pry pt- ptb ptc pte ptp ptr ptt pty py- pyb pyc pye pyr pyt rbb rbc rbe rbp rbr rbt rcb rcc rce rcp rcr rct re- reb rec ree rep rer ret rey rpb rpc rpe rpp rpr rpt rrb rrc rrp rrr rrt rtb rtc rte rtp rtr rtt rty ry- ryc rye ryr ryy tbb tbc tbe tbp tbr tbt tcb tcc tce tcp tcr tct te- teb tec tee tep ter tet tey tpb tpc tpe tpp tpr tpt trb trc tre trp trr trt try ttb ttc tte ttp ttr ttt tty tyc tye typ tyr tyt ybc ybe ybp ybr yby ycc yce ycp ycy yeb yec yee yep yer yet yey yrc yre yrp yrt ytc yte ytp ytr ytt yyb yyc yye yyt yyy