-er -ey -ic c-- ccc ccd cce cci cck ccr cdc cdd cde cdi cdk cdr cdy ce- cec ced cee cei cek cer cey ci- cic cid cie cii cik cir ckc ckd cki cky crc crd cre cri crk crr cry cyc cyd cye cyk cyr dcc dcd dce dci dck dcr ddc ddd dde ddi ddk ddr ddy de- dec ded dee dei dek der dey di- dic did die dii dik dir diy dkc dke dki dkk dkr drc drd dre dri drk drr dry dy- dyc dyd dye dyk dyr dyy ec- ecc ecd ece eci eck ecr ed- edc edd ede edi edk edr edy eec eed eee eek eer eey eic eid eie eii eik eir ekc ekd eke eki ekr eky erc erd ere eri erk err ery eyc eyd eye eyr i-d icc icd ice ici ick icr icy idc idd ide idi idk idr idy ie- iec ied iee iei iek ier iey iic iid iie iii iir ikc ike iki ikk ikr ir- irc ird ire iri irk irr iry iyc iye iyr iyy kcc kcd kce kci kck kcr kdc kde kdk kdr kdy ke- kec ked kee kei kek ker key kic kid kie kii kik kir kkc kke kki kkk kkr kky krc krd kri krk krr kry kyc kyd kye kyr rcc rcd rce rci rcr rdc rdd rde rdi rdr rdy re- rec red ree rei rek rer rey ric rid rie rii rik rir riy rkc rke rkk rky rrc rrd rri rrk rrr ry- ryc ryd rye ryk ryr ryy ycc ycd yce yci ycy yde ydy yec yed yee yei yek yer yey yid yie yii yir yki ykk yrc yre yyc yye yyy