c-- ccc ccn cco cct cn- cnc cnn cno cnt cny co- coc con coo cot coy ctc ctn cto ctt cty cyc cyn cyo cyt ncc ncn nco nct nnc nnn nno nnt no- noc non noo not noy ntc ntn nto ntt nyc nyn nyo nyt nyy oc- occ ocn oco oct on- onc onn ono ont ony oo- ooc oon ooo oot ot- otc otn oto ott oyo tcc tcn tco tct tnc tnn tno tnt to- toc ton too tot toy 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