-er -ic c-- ccc ccd cce cci cck ccr ccu cdc cdd cde cdi cdk cdr cdu ce- cec ced cee cei cek cer ceu ci- cic cid cie cii cik cir ciu ckc ckd cki crc crd cre cri crk crr cru cuc cud cue cui cuk cur cuu dcc dcd dce dci dck dcr dcu ddc ddd dde ddi ddk ddr ddu de- dec ded dee dei dek der deu di- dic did die dii dik dir diu dkc dke dki dkk dkr dku drc drd dre dri drk drr dru duc dud due dui duk dur ec- ecc ecd ece eci eck ecr ecu ed- edc edd ede edi edk edr edu eec eed eee eek eer eic eid eie eii eik eir eiu ekc ekd eke eki ekr eku erc erd ere eri erk err eru eu- euc eud eue eui eur i-d icc icd ice ici ick icr icu idc idd ide idi idk idr idu ie- iec ied iee iei iek ier iic iid iie iii iir iiu ikc ike iki ikk ikr iku ir- irc ird ire iri irk irr iru iu- iuc iud iue iui iur kcc kcd kce kci kck kcr kcu kdc kde kdk kdr kdu ke- kec ked kee kei kek ker kic kid kie kii kik kir kiu kkc kke kki kkk kkr kku krc krd kri krk krr kru kuc kud kue kui kuk kur kuu rcc rcd rce rci rcr rcu rdc rdd rde rdi rdr rdu re- rec red ree rei rek rer reu ric rid rie rii rik rir rkc rke rkk rku rrc rrd rri rrk rrr rru ruc rud rue rui ruk rur ruu ucc ucd uce uci uck ucr ucu udc udd ude udi udk udr udu uec ued uee uei uer uic uid uie uii uir uiu ukc uke uki ukk ukr uku ur- urc urd ure uri urk urr uru uuc uue uur uuu