c-- ccc cck ccn cco ccp ccr ccs ckc cko cks cn- cnc cnn cno cnp cnr cns co- coc cok con coo cop cor cos cpc cpk cpn cpo cpp cpr cps crc crk crn cro crp crr crs csc csk csn cso csp csr css kcc kck kcn kcp kcr kcs kkc kkk kkn kkp kkr kks kn- knc knk knn kno knp knr koc kok kon koo kop kor kos kpc kpk kpn kpo kpp kpr kps krc krk krn kro krp krr krs ksc ksk ksn kso ksp ksr kss ncc nck ncn nco ncp ncr ncs nkc nkk nkn nko nkp nkr nks nnc nnk nnn nno nnp nns no- noc nok non noo nop nor nos npc npn npo npp npr nps nrc nrk nrn nro nrp nrr nrs nsc nsk nsn nso nsp nsr nss oc- occ ock ocn oco ocp ocr ocs okc okk oko okp okr oks on- onc onk onn ono onp onr ons oo- ooc ook oon ooo oop oor oos op- opc opk opn opo opp opr ops or- orc ork orn oro orp orr ors os- osc osk osn oso osp osr oss p-p pcc pck pcn pco pcp pcr pcs pkc pkn pko pkp pkr pks pn- pnc pnk pnn pno pnp pnr pns poc pok pon poo pop por pos ppc ppk ppn ppo ppp ppr pps prc prk prn pro prp prr prs ps- psc psk psn pso psp psr pss rcc rcn rco rcp rcr rcs rkc rkk rko rkp rks rnc rnn rno rnp rnr rns roc rok ron roo rop ror ros rpc rpk rpn rpo rpp rpr rps rrc rrk rrn rrp rrr rrs rsc rsk rsn rso rsp rsr rss scc sck scn sco scp scr scs sk- skc skk sko skp skr sks snc snk snn sno snp snr sns soc sok son soo sop sor sos spc spk spn spo spp spr sps sr- src srk srn sro srp srr srs ss- ssc ssk ssn sso ssp ssr sss