-th c-- ccc ccd cch cco ccs cct cdc cdd cdh cdo cds cdt ch- chc chd chh cho chs cht co- coc cod coh coo cos cot csc csd csh cso css cst ctc ctd cth cto cts ctt dcc dcd dco dcs dct ddc ddd ddh ddo dds ddt dh- dhc dhd dhh dho dhs dht doc dod doh doo dos dot dsc dsd dsh dso dss dst dtc dtd dth dto dts dtt hcc hcd hch hco hcs hct hdc hdd hdh hdo hds hdt hhc hhd hhh hho hhs hht hoc hod hoh hoo hos hot hsc hsd hsh hss hst htc htd hth hto hts htt oc- occ ocd och oco ocs oct odc odd odh odo ods odt ohc ohd ohh oho ohs oht oo- ooc ood ooh ooo oos oot os- osc osd osh oso oss ost ot- otc otd oth oto ots ott scc scd sch sco scs sct sdc sdd sdh sdo sds sdt sh- shc shd shh sho shs sht soc sod soh soo sos sot ss- ssc ssd ssh sso sss sst stc std sth sto sts stt tcc tcd tch tco tcs tct tdc tdd tdh tdo tds tdt th- thc thd thh tho ths tht to- toc tod toh too tos tot tsc tsd tsh tso tss tst ttc ttd tth tto tts ttt