-er -ey b-u bbb bbd bbe bbi bbr bbu bby bdb bdd bde bdi bdr bdu bdy be- beb bed bee bei ber beu bey bi- bib bid bie bii bir biu biy brb brd bre bri brr bru bry bub bud bue bui bur buu buy by- byd bye byi byr byu dbb dbd dbe dbi dbr dbu dby ddb ddd dde ddi ddr ddu ddy de- deb ded dee dei der deu dey di- dib did die dii dir diu diy drb drd dre dri drr dru dry dub dud due dui dur duy dy- dyb dyd dye dyr dyu dyy ebb ebd ebe ebi ebr ebu eby ed- edb edd ede edi edr edu edy eeb eed eee eer eey eib eid eie eii eir eiu erb erd ere eri err eru ery eu- eub eud eue eui eur eyd eye eyr i-d ibb ibd ibe ibi ibr ibu iby idb idd ide idi idr idu idy ie- ied iee iei ier iey iib iid iie iii iir iiu ir- irb ird ire iri irr iru iry iu- iub iud iue iui iur iye iyr iyy rbb rbd rbe rbi rbr rbu rdb rdd rde rdi rdr rdu rdy re- reb red ree rei rer reu rey rib rid rie rii rir riy rrb rrd rri rrr rru rub rud rue rui rur ruu ruy ry- ryd rye ryr ryu ryy ubb ube ubi ubr ubu uby udb udd ude udi udr udu ueb ued uee uei uer uey uib uid uie uii uir uiu ur- urb urd ure uri urr uru ury uue uur uuu uyi uyu ybe ybi ybr yby yde ydy yeb yed yee yei yer yey yid yie yii yir yre yru yud yue yui yur yuu yuy yyb yye yyu yyy