-er c-- ccc cce cch ccp ccr ccs ce- cec cee ceh cep cer ces ch- chc che chh chp chr chs cpc cpe cph cpp cpr cps crc cre crh crp crr crs csc cse csh csp csr css ec- ecc ece ech ecr ecs eec eee eep eer ees ehc ehe ehh ehp ehr ehs ep- epc epe eph epp epr eps erc ere erh erp err ers es- esc ese esh esp esr ess hcc hce hch hcp hcr hcs he- hec hee heh hep her hes hhc hhe hhh hhp hhr hhs hpc hpe hph hpp hpr hps hr- hrc hre hrh hrp hrr hrs hsc hse hsh hsp hsr hss p-p pcc pce pch pcp pcr pcs pec pee peh pep per pes phc phe php phr phs ppc ppe pph ppp ppr pps prc pre prh prp prr prs ps- psc pse psh psp psr pss rcc rce rch rcp rcr rcs re- rec ree reh rep rer res rh- rhc rhe rhh rhp rhr rhs rpc rpe rph rpp rpr rps rrc rrh rrp rrr rrs rsc rse rsh rsp rsr rss scc sce sch scp scr scs se- sec see seh sep ser ses sh- shc she shh shp shr shs spc spe sph spp spr sps sr- src sre srh srp srr srs ss- ssc sse ssh ssp ssr sss