-er -ey bbb bbd bbe bbr bbs bby bdb bdd bde bdr bds bdy be- beb bed bee ber bes bey brb brd bre brr brs bry bsb bsd bse bsr bss bsy by- byd bye byr bys dbb dbd dbe dbr dbs dby ddb ddd dde ddr dds ddy de- deb ded dee der des dey drb drd dre drr drs dry dsb dsd dse dsr dss dsy dy- dyb dyd dye dyr dys dyy ebb ebd ebe ebr ebs eby ed- edb edd ede edr eds edy eeb eed eee eer ees eey erb erd ere err ers ery es- esb esd ese esr ess esy eyd eye eyr eys rbb rbd rbe rbr rbs rdb rdd rde rdr rds rdy re- reb red ree rer res rey rrb rrd rrr rrs rsb rsd rse rsr rss ry- ryd rye ryr rys ryy sbb sbd sbe sbr sbs sby sdb sdd sde sdr sds sdy se- seb sed see ser ses sey sr- srb srd sre srr srs sry ss- ssb ssd sse ssr sss sy- syb syd sye syr sys ybe ybr ybs yby yde yds ydy yeb yed yee yer yes yey yre yrs ysb yse ysr yss ysy yyb yye yys yyy