-th c-- ccc cch cco ccp ccs cct ch- chc chh cho chp chs cht co- coc coh coo cop cos cot cpc cph cpo cpp cps cpt csc csh cso csp css cst ctc cth cto ctp cts ctt hcc hch hco hcp hcs hct hhc hhh hho hhp hhs hht hoc hoh hoo hop hos hot hpc hph hpo hpp hps hpt hsc hsh hsp hss hst htc hth hto htp hts htt oc- occ och oco ocp ocs oct ohc ohh oho ohp ohs oht oo- ooc ooh ooo oop oos oot op- opc oph opo opp ops opt os- osc osh oso osp oss ost ot- otc oth oto otp ots ott p-p pcc pch pco pcp pcs pct phc pho php phs pht poc poh poo pop pos pot ppc pph ppo ppp pps ppt ps- psc psh pso psp pss pst pt- ptc pth pto ptp pts ptt scc sch sco scp scs sct sh- shc shh sho shp shs sht soc soh soo sop sos sot spc sph spo spp sps spt ss- ssc ssh sso ssp sss sst stc sth sto stp sts stt tcc tch tco tcp tcs tct th- thc thh tho thp ths tht to- toc toh too top tos tot tpc tph tpo tpp tps tpt tsc tsh tso tsp tss tst ttc tth tto ttp tts ttt