-er -ey bbb bbd bbe bbi bbr bbt bby bdb bdd bde bdi bdr bdt bdy be- beb bed bee bei ber bet bey bi- bib bid bie bii bir bit biy brb brd bre bri brr brt bry btb btd bte bti btr btt bty by- byd bye byi byr byt dbb dbd dbe dbi dbr dbt dby ddb ddd dde ddi ddr ddt ddy de- deb ded dee dei der det dey di- dib did die dii dir dit diy drb drd dre dri drr drt dry dtb dtd dte dti dtr dtt dty dy- dyb dyd dye dyr dyy ebb ebd ebe ebi ebr ebt eby ed- edb edd ede edi edr edt edy eeb eed eee eer eet eey eib eid eie eii eir eit erb erd ere eri err ert ery etb etd ete eti etr ett ety eyd eye eyr eyt i-d ibb ibd ibe ibi ibr ibt iby idb idd ide idi idr idt idy ie- ied iee iei ier iet iey iib iid iie iii iir iit ir- irb ird ire iri irr irt iry itb itd ite iti itt ity iye iyr iyt iyy rbb rbd rbe rbi rbr rbt rdb rdd rde rdi rdr rdt rdy re- reb red ree rei rer ret rey rib rid rie rii rir rit riy rrb rrd rri rrr rrt rtb rtd rte rti rtr rtt rty ry- ryd rye ryr ryy tbb tbd tbe tbi tbr tbt tdb tdd tde tdi tdr tdt tdy te- teb ted tee tei ter tet tey tib tid tie tii tir tit tiy trb trd tre tri trr trt try ttb ttd tte tti ttr ttt tty tyd tye tyr tyt ybe ybi ybr yby yde ydt ydy yeb yed yee yei yer yet yey yid yie yii yir yit yre yrt ytd yte ytr ytt yyb yye yyt yyy