c-- ccc ccn cco ccr cn- cnc cnn cno cnr cny co- coc con coo cor coy crc crn cro crr cry cyc cyn cyo cyr ncc ncn nco ncr nnc nnn nno no- noc non noo nor noy nrc nrn nro nrr nry nyc nyn nyo nyy oc- occ ocn oco ocr on- onc onn ono onr ony oo- ooc oon ooo oor or- orc orn oro orr ory oyo rcc rcn rco rcr rnc rnn rno rnr rny roc ron roo ror roy rrc rrn rrr ry- ryc ryn ryo ryr ryy ycc yco ycy ynn yny yoc yon yoo yor yoy yrc yrn yro yyc yyy