-er -ey c-- ccc ccd cce ccr ccu cdc cdd cde cdr cdu cdy ce- cec ced cee cer ceu cey crc crd cre crr cru cry cuc cud cue cur cuu cuy cyc cyd cye cyr dcc dcd dce dcr dcu ddc ddd dde ddr ddu ddy de- dec ded dee der deu dey drc drd dre drr dru dry duc dud due dur duy dy- dyc dyd dye dyr dyu dyy ec- ecc ecd ece ecr ecu ed- edc edd ede edr edu edy eec eed eee eer eey erc erd ere err eru ery eu- euc eud eue eur eyc eyd eye eyr rcc rcd rce rcr rcu rdc rdd rde rdr rdu rdy re- rec red ree rer reu rey rrc rrd rrr rru ruc rud rue rur ruu ruy ry- ryc ryd rye ryr ryu ryy ucc ucd uce ucr ucu udc udd ude udr udu uec ued uee uer uey ur- urc urd ure urr uru ury uuc uue uur uuu uyc uyu ycc ycd yce ycu ycy yde ydy yec yed yee yer yey yrc yre yru yud yue yur yuu yuy yyc yye yyu yyy