-er -th c-- ccc cce cch ccr ccs cct ce- cec cee ceh cer ces cet ch- chc che chh chr chs cht crc cre crh crr crs crt csc cse csh csr css cst ctc cte cth ctr cts ctt ec- ecc ece ech ecr ecs ect eec eee eer ees eet ehc ehe ehh ehr ehs eht erc ere erh err ers ert es- esc ese esh esr ess est etc ete eth etr ets ett hcc hce hch hcr hcs hct he- hec hee heh her hes het hhc hhe hhh hhr hhs hht hr- hrc hre hrh hrr hrs hrt hsc hse hsh hsr hss hst htc hte hth htr hts htt rcc rce rch rcr rcs rct re- rec ree reh rer res ret rh- rhc rhe rhh rhr rhs rht rrc rrh rrr rrs rrt rsc rse rsh rsr rss rst rtc rte rtr rts rtt scc sce sch scr scs sct se- sec see seh ser ses set sh- shc she shh shr shs sht sr- src sre srh srr srs srt ss- ssc sse ssh ssr sss sst stc ste sth str sts stt tcc tce tch tcr tcs tct te- tec tee teh ter tes tet th- thc the thh thr ths tht trc tre trh trr trs trt tsc tse tsh tsr tss tst ttc tte tth ttr tts ttt