-th c-- ccc ccd cce cch ccs cct cdc cdd cde cdh cds cdt ce- cec ced cee ceh ces cet ch- chc chd che chh chs cht csc csd cse csh css cst ctc ctd cte cth cts ctt dcc dcd dce dcs dct ddc ddd dde ddh dds ddt de- dec ded dee deh des det dh- dhc dhd dhe dhh dhs dht dsc dsd dse dsh dss dst dtc dtd dte dth dts dtt ec- ecc ecd ece ech ecs ect ed- edc edd ede edh eds edt eec eed eee ees eet ehc ehd ehe ehh ehs eht es- esc esd ese esh ess est etc etd ete eth ets ett hcc hcd hce hch hcs hct hdc hdd hde hdh hds hdt he- hec hed hee heh hes het hhc hhd hhe hhh hhs hht hsc hsd hse hsh hss hst htc htd hte hth hts htt scc scd sce sch scs sct sdc sdd sde sdh sds sdt se- sec sed see seh ses set sh- shc shd she shh shs sht ss- ssc ssd sse ssh sss sst stc std ste sth sts stt tcc tcd tce tch tcs tct tdc tdd tde tdh tds tdt te- tec ted tee teh tes tet th- thc thd the thh ths tht tsc tsd tse tsh tss tst ttc ttd tte tth tts ttt