-er -ic c-- ccc cce cci cck ccr ccs ccu ce- cec cee cei cek cer ces ceu ci- cic cie cii cik cir cis ciu ckc cki cks crc cre cri crk crr crs cru csc cse csi csk csr css csu cuc cue cui cuk cur cus cuu ec- ecc ece eci eck ecr ecs ecu eec eee eek eer ees eic eie eii eik eir eis eiu ekc eke eki ekr eks eku erc ere eri erk err ers eru es- esc ese esi esk esr ess esu eu- euc eue eui eur eus icc ice ici ick icr ics icu ie- iec iee iei iek ier ies iic iie iii iir iis iiu ikc ike iki ikk ikr iks iku ir- irc ire iri irk irr irs iru is- isc ise isi isk isr iss isu iu- iuc iue iui iur ius kcc kce kci kck kcr kcs kcu ke- kec kee kei kek ker kes kic kie kii kik kir kis kiu kkc kke kki kkk kkr kks kku krc kri krk krr krs kru ksc kse ksi ksk ksr kss ksu kuc kue kui kuk kur kus kuu rcc rce rci rcr rcs rcu re- rec ree rei rek rer res reu ric rie rii rik rir ris rkc rke rkk rks rku rrc rri rrk rrr rrs rru rsc rse rsi rsk rsr rss rsu ruc rue rui ruk rur rus ruu scc sce sci sck scr scs scu se- sec see sei sek ser ses seu sic sie sii sik sir sis siu sk- skc ske ski skk skr sks sku sr- src sre sri srk srr srs ss- ssc sse ssi ssk ssr sss ssu suc sue sui suk sur sus suu ucc uce uci uck ucr ucs ucu uec uee uei uer ues uic uie uii uir uis uiu ukc uke uki ukk ukr uku ur- urc ure uri urk urr urs uru usc use usi usk usr uss usu uuc uue uur uus uuu