c-- ccc cck cco ccp cct ckc cko ckt cky co- coc cok coo cop cot coy cpc cpk cpo cpp cpt ctc ctk cto ctp ctt cty cyc cyk cyo cyp cyt k-t kcc kck kcp kct kkc kkk kkp kkt kky koc kok koo kop kot koy kpc kpk kpo kpp kpt ktc ktk kto ktp ktt kyc kyo kyp kyt oc- occ ock oco ocp oct okc okk oko okp oo- ooc ook ooo oop oot op- opc opk opo opp opt opy ot- otc otk oto otp ott oyo p-p pcc pck pco pcp pct pkc pko pkp pkt pky poc pok poo pop pot poy ppc ppk ppo ppp ppt pt- ptc ptk pto ptp ptt pty py- pyc pyk pyo pyt tcc tck tco tcp tct tkc tkk tko tkp tkt tky to- toc tok too top tot toy tpc tpk tpo tpp tpt ttc ttk tto ttp ttt tty tyc tyo typ tyt ycc yco ycp ycy ykk yoc yok yoo yop yot yoy ypo ytc ytk yto ytp ytt yyc yyt yyy