-th c-- ccc cch cck cco cct ch- chc chh chk cho cht ckc ckh cko ckt co- coc coh cok coo cot ctc cth ctk cto ctt hcc hch hck hco hct hhc hhh hhk hho hht hkh hkk hko hkt hoc hoh hok hoo hot htc hth htk hto htt k-t kcc kch kck kct khh khk kho kkc kkh kkk kkt koc koh kok koo kot ktc kth ktk kto ktt oc- occ och ock oco oct ohc ohh oho oht okc okk oko oo- ooc ooh ook ooo oot ot- otc oth otk oto ott tcc tch tck tco tct th- thc thh thk tho tht tkc tkk tko tkt to- toc toh tok too tot ttc tth ttk tto ttt