c-- ccc ccn cco ccr ccs ccu cn- cnc cnn cno cnr cns cnu co- coc con coo cor cos cou crc crn cro crr crs cru csc csn cso csr css csu cuc cun cuo cur cus cuu ncc ncn nco ncr ncs ncu nnc nnn nno nns nnu no- noc non noo nor nos nou nrc nrn nro nrr nrs nru nsc nsn nso nsr nss nsu nuc nun nuo nur nus nuu oc- occ ocn oco ocr ocs ocu on- onc onn ono onr ons onu oo- ooc oon ooo oor oos or- orc orn oro orr ors oru os- osc osn oso osr oss osu ou- ouc oun ouo our ous rcc rcn rco rcr rcs rcu rnc rnn rno rnr rns rnu roc ron roo ror ros rou rrc rrn rrr rrs rru rsc rsn rso rsr rss rsu ruc run ruo rur rus ruu scc scn sco scr scs scu snc snn sno snr sns snu soc son soo sor sos sou sr- src srn sro srr srs ss- ssc ssn sso ssr sss ssu suc sun suo sur sus suu ucc ucn uco ucr ucs ucu un- unc unn uno unr uns unu uoc uon uoo uor uos ur- urc urn uro urr urs uru usc usn uso usr uss usu uuc uun uur uus uuu