-er -ey b-p bbb bbe bbp bbr bbs bbt bby be- beb bee bep ber bes bet bey bpb bpe bpp bpr bps bpt bpy brb bre brp brr brs brt bry bsb bse bsp bsr bss bst bsy btb bte btp btr bts btt bty by- bye byp byr bys byt ebb ebe ebp ebr ebs ebt eby eeb eee eep eer ees eet eey ep- epb epe epp epr eps ept erb ere erp err ers ert ery es- esb ese esp esr ess est esy etb ete etp etr ets ett ety eye eyp eyr eys eyt p-p pbb pbe pbp pbr pbs pbt pby peb pee pep per pes pet pey ppb ppe ppp ppr pps ppt prb pre prp prr prs prt pry ps- psb pse psp psr pss pst psy pt- ptb pte ptp ptr pts ptt pty py- pyb pye pyr pys pyt rbb rbe rbp rbr rbs rbt re- reb ree rep rer res ret rey rpb rpe rpp rpr rps rpt rrb rrp rrr rrs rrt rsb rse rsp rsr rss rst rtb rte rtp rtr rts rtt rty ry- rye ryr rys ryy sbb sbe sbp sbr sbs sbt sby se- seb see sep ser ses set sey spb spe spp spr sps spt spy sr- srb sre srp srr srs srt sry ss- ssb sse ssp ssr sss sst stb ste stp str sts stt sty sy- syb sye syp syr sys syt tbb tbe tbp tbr tbs tbt te- teb tee tep ter tes tet tey tpb tpe tpp tpr tps tpt trb tre trp trr trs trt try tsb tse tsp tsr tss tst tsy ttb tte ttp ttr tts ttt tty tye typ tyr tys tyt ybe ybp ybr ybs yby yeb yee yep yer yes yet yey yps yre yrp yrs yrt ysb yse ysp ysr yss yst ysy yte ytp ytr yts ytt yyb yye yys yyt yyy