-er c-- ccc cce ccf cch ccr ccs ce- cec cee cef ceh cer ces cfc cfe cff cfh cfr cfs ch- chc che chf chh chr chs crc cre crf crh crr crs csc cse csf csh csr css ec- ecc ece ecf ech ecr ecs eec eee eef eer ees ef- efc efe eff efh efr efs ehc ehe ehf ehh ehr ehs erc ere erf erh err ers es- esc ese esf esh esr ess fcc fce fcf fcr fcs fec fee fef feh fer fes ffc ffe fff ffh ffr ffs fhc fhe fhf fhh fhr fhs frc fre frf frh frr frs fsc fse fsf fsh fsr fss hcc hce hcf hch hcr hcs he- hec hee hef heh her hes hfc hfe hff hfh hfr hfs hhc hhe hhf hhh hhr hhs hr- hrc hre hrf hrh hrr hrs hsc hse hsf hsh hsr hss rcc rce rcf rch rcr rcs re- rec ree ref reh rer res rfc rfe rff rfh rfr rfs rh- rhc rhe rhf rhh rhr rhs rrc rrf rrh rrr rrs rsc rse rsf rsh rsr rss scc sce scf sch scr scs se- sec see sef seh ser ses sfc sfe sff sfh sfr sfs sh- shc she shf shh shr shs sr- src sre srf srh srr srs ss- ssc sse ssf ssh ssr sss