-er -ic c-- ccc cce cci ccr ccs ccu ce- cec cee cei cer ces ceu ci- cic cie cii cir cis ciu crc cre cri crr crs cru csc cse csi csr css csu cuc cue cui cur cus cuu ec- ecc ece eci ecr ecs ecu eec eee eer ees eic eie eii eir eis eiu erc ere eri err ers eru es- esc ese esi esr ess esu eu- euc eue eui eur eus icc ice ici icr ics icu ie- iec iee iei ier ies iic iie iii iir iis iiu ir- irc ire iri irr irs iru is- isc ise isi isr iss isu iu- iuc iue iui iur ius rcc rce rci rcr rcs rcu re- rec ree rei rer res reu ric rie rii rir ris rrc rri rrr rrs rru rsc rse rsi rsr rss rsu ruc rue rui rur rus ruu scc sce sci scr scs scu se- sec see sei ser ses seu sic sie sii sir sis siu sr- src sre sri srr srs ss- ssc sse ssi ssr sss ssu suc sue sui sur sus suu ucc uce uci ucr ucs ucu uec uee uei uer ues uic uie uii uir uis uiu ur- urc ure uri urr urs uru usc use usi usr uss usu uuc uue uur uus uuu