-er -ic c-- ccc cce cci cck ccr ccu ce- cec cee cei cek cer ceu ci- cic cie cii cik cir ciu ckc cki crc cre cri crk crr cru cuc cue cui cuk cur cuu ec- ecc ece eci eck ecr ecu eec eee eek eer eic eie eii eik eir eiu ekc eke eki ekr eku erc ere eri erk err eru eu- euc eue eui eur icc ice ici ick icr icu ie- iec iee iei iek ier iic iie iii iir iiu ikc ike iki ikk ikr iku ir- irc ire iri irk irr iru iu- iuc iue iui iur kcc kce kci kck kcr kcu ke- kec kee kei kek ker kic kie kii kik kir kiu kkc kke kki kkk kkr kku krc kri krk krr kru kuc kue kui kuk kur kuu rcc rce rci rcr rcu re- rec ree rei rek rer reu ric rie rii rik rir rkc rke rkk rku rrc rri rrk rrr rru ruc rue rui ruk rur ruu ucc uce uci uck ucr ucu uec uee uei uer uic uie uii uir uiu ukc uke uki ukk ukr uku ur- urc ure uri urk urr uru uuc uue uur uuu