c-- ccc cck ccn cco ccr ccs ccu ckc cko cks cn- cnc cnn cno cnr cns cnu co- coc cok con coo cor cos cou crc crk crn cro crr crs cru csc csk csn cso csr css csu cuc cuk cun cuo cur cus cuu kcc kck kcn kcr kcs kcu kkc kkk kkn kkr kks kku kn- knc knk knn kno knr knu koc kok kon koo kor kos kou krc krk krn kro krr krs kru ksc ksk ksn kso ksr kss ksu kuc kuk kun kur kus kuu ncc nck ncn nco ncr ncs ncu nkc nkk nkn nko nkr nks nku nnc nnk nnn nno nns nnu no- noc nok non noo nor nos nou nrc nrk nrn nro nrr nrs nru nsc nsk nsn nso nsr nss nsu nuc nuk nun nuo nur nus nuu oc- occ ock ocn oco ocr ocs ocu okc okk oko okr oks oku on- onc onk onn ono onr ons onu oo- ooc ook oon ooo oor oos or- orc ork orn oro orr ors oru os- osc osk osn oso osr oss osu ou- ouc ouk oun ouo our ous rcc rcn rco rcr rcs rcu rkc rkk rko rks rku rnc rnn rno rnr rns rnu roc rok ron roo ror ros rou rrc rrk rrn rrr rrs rru rsc rsk rsn rso rsr rss rsu ruc ruk run ruo rur rus ruu scc sck scn sco scr scs scu sk- skc skk sko skr sks sku snc snk snn sno snr sns snu soc sok son soo sor sos sou sr- src srk srn sro srr srs ss- ssc ssk ssn sso ssr sss ssu suc suk sun suo sur sus suu ucc uck ucn uco ucr ucs ucu ukc ukk ukn ukr uku un- unc unk unn uno unr uns unu uoc uok uon uoo uor uos ur- urc urk urn uro urr urs uru usc usk usn uso usr uss usu uuc uun uur uus uuu