-th c-- ccc cch ccn ccs cct ch- chc chh chn chs cht cn- cnc cnh cnn cns cnt csc csh csn css cst ctc cth ctn cts ctt hcc hch hcn hcs hct hhc hhh hhn hhs hht hnc hnh hnn hns hnt hsc hsh hsn hss hst htc hth htn hts htt ncc nch ncn ncs nct nhc nhh nhn nhs nht nnc nnh nnn nns nnt nsc nsh nsn nss nst ntc nth ntn nts ntt scc sch scn scs sct sh- shc shh shn shs sht snc snn sns snt ss- ssc ssh ssn sss sst stc sth stn sts stt tcc tch tcn tcs tct th- thc thh thn ths tht tnc tnh tnn tns tnt tsc tsh tsn tss tst ttc tth ttn tts ttt