-er -ey b-p bbb bbc bbe bbp bbr bbs bby bcb bcc bce bcp bcr bcs bcy be- beb bec bee bep ber bes bey bpb bpc bpe bpp bpr bps bpy brb bre brp brr brs bry bsb bsc bse bsp bsr bss bsy by- byc bye byp byr bys c-- cbb cbc cbe cbp cbr cbs cby ccb ccc cce ccp ccr ccs ce- ceb cec cee cep cer ces cey cpb cpc cpe cpp cpr cps crb crc cre crp crr crs cry csb csc cse csp csr css csy cyb cyc cye cyp cyr cys ebb ebc ebe ebp ebr ebs eby ec- ecb ecc ece ecr ecs eeb eec eee eep eer ees eey ep- epb epc epe epp epr eps erb erc ere erp err ers ery es- esb esc ese esp esr ess esy eyc eye eyp eyr eys p-p pbb pbc pbe pbp pbr pbs pby pcb pcc pce pcp pcr pcs peb pec pee pep per pes pey ppb ppc ppe ppp ppr pps prb prc pre prp prr prs pry ps- psb psc pse psp psr pss psy py- pyb pyc pye pyr pys rbb rbc rbe rbp rbr rbs rcb rcc rce rcp rcr rcs re- reb rec ree rep rer res rey rpb rpc rpe rpp rpr rps rrb rrc rrp rrr rrs rsb rsc rse rsp rsr rss ry- ryc rye ryr rys ryy sbb sbc sbe sbp sbr sbs sby scb scc sce scp scr scs se- seb sec see sep ser ses sey spb spc spe spp spr sps spy sr- srb src sre srp srr srs sry ss- ssb ssc sse ssp ssr sss sy- syb syc sye syp syr sys ybc ybe ybp ybr ybs yby ycc yce ycp ycs ycy yeb yec yee yep yer yes yey yps yrc yre yrp yrs ysb ysc yse ysp ysr yss ysy yyb yyc yye yys yyy