-er -ey b-u bbb bbd bbe bbk bbr bbu bby bdb bdd bde bdk bdr bdu bdy be- beb bed bee bek ber beu bey bkb bke bkk bkr brb brd bre brk brr bru bry bub bud bue buk bur buu buy by- byd bye byk byr byu dbb dbd dbe dbk dbr dbu dby ddb ddd dde ddk ddr ddu ddy de- deb ded dee dek der deu dey dkb dke dkk dkr dku drb drd dre drk drr dru dry dub dud due duk dur duy dy- dyb dyd dye dyk dyr dyu dyy ebb ebd ebe ebk ebr ebu eby ed- edb edd ede edk edr edu edy eeb eed eee eek eer eey ekb ekd eke ekr eku eky erb erd ere erk err eru ery eu- eub eud eue eur eyd eye eyr kbb kbd kbe kbk kbr kbu kdb kde kdk kdr kdu kdy ke- keb ked kee kek ker key kkb kke kkk kkr kku kky krd krk krr kru kry kub kud kue kuk kur kuu kuy kyd kye kyr kyu rbb rbd rbe rbk rbr rbu rdb rdd rde rdr rdu rdy re- reb red ree rek rer reu rey rkb rke rkk rku rky rrb rrd rrk rrr rru rub rud rue ruk rur ruu ruy ry- ryd rye ryk ryr ryu ryy ubb ube ubk ubr ubu uby udb udd ude udk udr udu ueb ued uee uer uey ukb uke ukk ukr uku ur- urb urd ure urk urr uru ury uue uur uuu uyu ybe ybr yby yde ydy yeb yed yee yek yer yey ykk yre yru yud yue yuk yur yuu yuy yyb yye yyu yyy