-er -ey bbb bbc bbe bbr bbs bbw bby bcb bcc bce bcr bcs bcy be- beb bec bee ber bes bew bey brb bre brr brs brw bry bsb bsc bse bsr bss bsw bsy bwb bwc bwr bws bwy by- byc bye byr bys c-- cbb cbc cbe cbr cbs cbw cby ccb ccc cce ccr ccs ccw ce- ceb cec cee cer ces cew cey crb crc cre crr crs crw cry csb csc cse csr css csw csy cw- cwb cwc cwe cwr cws cyb cyc cye cyr cys cyw ebb ebc ebe ebr ebs ebw eby ec- ecb ecc ece ecr ecs ecw eeb eec eee eer ees eew eey erb erc ere err ers erw ery es- esb esc ese esr ess esw esy ewb ewc ewe ewr ews eww ewy eyc eye eyr eys rbb rbc rbe rbr rbs rbw rcb rcc rce rcr rcs rcw re- reb rec ree rer res rew rey rrb rrc rrr rrs rsb rsc rse rsr rss rsw rwb rwc rwe rwr rws rwy ry- ryc rye ryr rys ryy sbb sbc sbe sbr sbs sbw sby scb scc sce scr scs scw se- seb sec see ser ses sew sey sr- srb src sre srr srs srw sry ss- ssb ssc sse ssr sss ssw swb swc swe swr sws swy sy- syb syc sye syr sys wbb wbc wbe wbr wbs wbw wcb wcc wce wcr wcs wcw web wec wee wer wes wew wey wr- wrc wre wrr wrs wrw wry wsb wsc wse wsr wss wsw wwc wwe www wy- wyc wye wyr wys ybc ybe ybr ybs yby ycc yce ycs ycw ycy yeb yec yee yer yes yew yey yrc yre yrs ysb ysc yse ysr yss ysy ywc yyb yyc yye yys yyy