-er -ic c-- ccc cce ccf cci ccm ccr ce- cec cee cef cei cem cer cfc cfe cff cfi cfm cfr ci- cic cie cif cii cim cir cmc cme cmf cmi cmm cmr crc cre crf cri crm crr ec- ecc ece ecf eci ecm ecr eec eee eef eem eer ef- efc efe eff efi efm efr eic eie eif eii eim eir em- emc eme emf emi emm emr erc ere erf eri erm err fcc fce fcf fci fcm fcr fec fee fef fei fem fer ffc ffe fff ffi ffm ffr fic fie fif fii fim fir fmc fme fmf fmi fmm fmr frc fre frf fri frm frr i-f icc ice icf ici icm icr ie- iec iee ief iei iem ier ifc ife iff ifi ifm ifr iic iie iif iii iim iir im- imc ime imf imi imm ir- irc ire irf iri irm irr m-f m-r mc- mcc mce mcf mci mcm mcr mec mee mef mei mem mer mfc mfe mff mfi mfm mfr mi- mic mie mif mii mim mir mmc mme mmf mmi mmm mmr mrc mre mrf mri mrm mrr rcc rce rcf rci rcm rcr re- rec ree ref rei rem rer rfc rfe rff rfi rfm rfr ric rie rif rii rim rir rmc rme rmf rmi rmm rmr rrc rrf rri rrm rrr