-th c-- ccc cch cco ccp cct ch- chc chh cho chp cht chy co- coc coh coo cop cot coy cpc cph cpo cpp cpt ctc cth cto ctp ctt cty cyc cyo cyp cyt hcc hch hco hcp hct hcy hhc hhh hho hhp hht hhy hoc hoh hoo hop hot hoy hpc hph hpo hpp hpt hpy htc hth hto htp htt hty hy- hyc hyh hyo hyp hyt hyy oc- occ och oco ocp oct ohc ohh oho ohp oht oo- ooc ooh ooo oop oot op- opc oph opo opp opt opy ot- otc oth oto otp ott oyo p-p pcc pch pco pcp pct phc pho php pht phy poc poh poo pop pot poy ppc pph ppo ppp ppt pt- ptc pth pto ptp ptt pty py- pyc pyo pyt tcc tch tco tcp tct th- thc thh tho thp tht thy to- toc toh too top tot toy tpc tph tpo tpp tpt ttc tth tto ttp ttt tty tyc tyo typ tyt ycc ych yco ycp ycy yhc yht yoc yoo yop yot yoy ypo ytc yth yto ytp ytt yyc yyt yyy