c-- ccc ccn cco ccr ccu cn- cnc cnn cno cnr cnu co- coc con coo cor cou crc crn cro crr cru cuc cun cuo cur cuu ncc ncn nco ncr ncu nnc nnn nno nnu no- noc non noo nor nou nrc nrn nro nrr nru nuc nun nuo nur nuu oc- occ ocn oco ocr ocu on- onc onn ono onr onu oo- ooc oon ooo oor or- orc orn oro orr oru ou- ouc oun ouo our rcc rcn rco rcr rcu rnc rnn rno rnr rnu roc ron roo ror rou rrc rrn rrr rru ruc run ruo rur ruu ucc ucn uco ucr ucu un- unc unn uno unr unu uoc uon uoo uor ur- urc urn uro urr uru uuc uun uur uuu