-er -ic c-- ccc cce cci ccm ccr ccs ce- cec cee cei cem cer ces ci- cic cie cii cim cir cis cmc cme cmi cmm cmr cms crc cre cri crm crr crs csc cse csi csm csr css ec- ecc ece eci ecm ecr ecs eec eee eem eer ees eic eie eii eim eir eis em- emc eme emi emm emr ems erc ere eri erm err ers es- esc ese esi esm esr ess icc ice ici icm icr ics ie- iec iee iei iem ier ies iic iie iii iim iir iis im- imc ime imi imm ims ir- irc ire iri irm irr irs is- isc ise isi ism isr iss m-r mc- mcc mce mci mcm mcr mcs mec mee mei mem mer mes mi- mic mie mii mim mir mis mmc mme mmi mmm mmr mms mrc mre mri mrm mrr mrs msc mse msi msm msr mss rcc rce rci rcm rcr rcs re- rec ree rei rem rer res ric rie rii rim rir ris rmc rme rmi rmm rmr rms rrc rri rrm rrr rrs rsc rse rsi rsm rsr rss scc sce sci scm scr scs se- sec see sei sem ser ses sic sie sii sim sir sis smc sme smi smm smr sms sr- src sre sri srm srr srs ss- ssc sse ssi ssm ssr sss