c-- ccc cck ccm cco cct ccz ckc ckm cko ckt cky cmc cmk cmm cmo cmt cmy co- coc cok com coo cot coy coz ctc ctk ctm cto ctt cty ctz cyc cyk cym cyo cyt cz- czc czk czm czo czt k-t k-z kcc kck kcm kct kkc kkk kkm kkt kky kmc kmk kmm kmo kmt kmz koc kok kom koo kot koy koz ktc ktk ktm kto ktt kyc kym kyo kyt kyz kzo kzy m-o mc- mcc mck mcm mco mct mcz mkc mkk mkm mko mkt mky mkz mmc mmk mmm mmo mmt mmz moc mok mom moo mot moy moz mtc mtk mtm mto mtt my- myc myk mym myo myt mzm mzt oc- occ ock ocm oco oct ocz okc okk oko om- omc omm omo omt omy omz oo- ooc ook oom ooo oot ot- otc otk otm oto ott otz oyo ozm ozo ozt ozz tcc tck tcm tco tct tkc tkk tkm tko tkt tky tkz tmc tmk tmm tmo tmt tmy tmz to- toc tok tom too tot toy toz ttc ttk ttm tto ttt tty tyc tym tyo tyt ycc yco ycy ykk ykm ymc ymm ymo ymt yoc yok yom yoo yot yoy ytc ytk ytm yto ytt yyc yyt yyy yyz yzy zco zmc zmk zmm zmt zo- zoc zok zom zoo zot ztm zym zzt zzy zzz