c-- ccc ccn cco ccr cn- cnc cnn cno cnr co- coc con coo coq cor cqc cqo crc crn cro crq crr ncc ncn nco ncr nnc nnn nno no- noc non noo nor nqc nrc nrn nro nrr oc- occ ocn oco ocr on- onc onn ono onr oo- ooc oon ooo oor oqo or- orc orn oro orr qcc qco qoo qor qqq qrc rcc rcn rco rcr rnc rnn rno rnr roc ron roo ror rqc rqn rrc rrn rrq rrr