-er -th c-- ccc ccd cce cch ccr ccs cct cdc cdd cde cdh cdr cds cdt ce- cec ced cee ceh cer ces cet ch- chc chd che chh chr chs cht crc crd cre crh crr crs crt csc csd cse csh csr css cst ctc ctd cte cth ctr cts ctt dcc dcd dce dcr dcs dct ddc ddd dde ddh ddr dds ddt de- dec ded dee deh der des det dh- dhc dhd dhe dhh dhr dhs dht drc drd dre drr drs drt dsc dsd dse dsh dsr dss dst dtc dtd dte dth dtr dts dtt ec- ecc ecd ece ech ecr ecs ect ed- edc edd ede edh edr eds edt eec eed eee eer ees eet ehc ehd ehe ehh ehr ehs eht erc erd ere erh err ers ert es- esc esd ese esh esr ess est etc etd ete eth etr ets ett hcc hcd hce hch hcr hcs hct hdc hdd hde hdh hdr hds hdt he- hec hed hee heh her hes het hhc hhd hhe hhh hhr hhs hht hr- hrc hrd hre hrh hrr hrs hrt hsc hsd hse hsh hsr hss hst htc htd hte hth htr hts htt rcc rcd rce rch rcr rcs rct rdc rdd rde rdh rdr rds rdt re- rec red ree reh rer res ret rh- rhc rhd rhe rhh rhr rhs rht rrc rrd rrh rrr rrs rrt rsc rsd rse rsh rsr rss rst rtc rtd rte rtr rts rtt scc scd sce sch scr scs sct sdc sdd sde sdh sdr sds sdt se- sec sed see seh ser ses set sh- shc shd she shh shr shs sht sr- src srd sre srh srr srs srt ss- ssc ssd sse ssh ssr sss sst stc std ste sth str sts stt tcc tcd tce tch tcr tcs tct tdc tdd tde tdh tdr tds tdt te- tec ted tee teh ter tes tet th- thc thd the thh thr ths tht trc trd tre trh trr trs trt tsc tsd tse tsh tsr tss tst ttc ttd tte tth ttr tts ttt