c-- ccc ccn cco cct ccz cn- cnc cnn cno cnt cny co- coc con coo cot coy coz ctc ctn cto ctt cty ctz cyc cyn cyo cyt cz- czc czo czt ncc ncn nco nct nnc nnn nno nnt nnz no- noc non noo not noy noz ntc ntn nto ntt ntz nyc nyn nyo nyt nyy nzo nzz oc- occ ocn oco oct ocz on- onc onn ono ont ony oo- ooc oon ooo oot ot- otc otn oto ott otz oyo ozo ozt ozz tcc tcn tco tct tnc tnn tno tnt tnz to- toc ton too tot toy toz ttc ttn tto ttt tty tyc tyn tyo tyt ycc yco ycy ynn yny yoc yon yoo yot yoy ytc ytn yto ytt yyc yyt yyy yyz yzy zco znc znn zno zo- zoc zon zoo zot zzt zzy zzz