c-- ccc cce cck ccn cco ccp ccs ce- cec cee cek cen ceo cep ces ckc cko cks cn- cnc cne cnn cno cnp cns co- coc coe cok con coo cop cos cpc cpe cpk cpn cpo cpp cps csc cse csk csn cso csp css ec- ecc ece eck ecn eco ecs eec eee eek een eeo eep ees ekc eke eko ekp eks en- enc ene enk enn eno enp ens eo- eoc eoe eok eon eoo eop eos ep- epc epe epn epo epp eps es- esc ese esk esn eso esp ess kcc kce kck kcn kcp kcs ke- kec kee kek ken keo kep kes kkc kke kkk kkn kkp kks kn- knc kne knk knn kno knp koc koe kok kon koo kop kos kpc kpe kpk kpn kpo kpp kps ksc kse ksk ksn kso ksp kss ncc nce nck ncn nco ncp ncs ne- nec nee nek nen neo nep nes nkc nke nkk nkn nko nkp nks nnc nne nnk nnn nno nnp nns no- noc noe nok non noo nop nos npc npe npn npo npp nps nsc nse nsk nsn nso nsp nss oc- occ ock ocn oco ocp ocs oec oee oen oeo oep oes okc oke okk oko okp oks on- onc one onk onn ono onp ons oo- ooc ook oon ooo oop oos op- opc ope opk opn opo opp ops os- osc ose osk osn oso osp oss p-p pcc pce pck pcn pco pcp pcs pec pee pek pen peo pep pes pkc pke pkn pko pkp pks pn- pnc pne pnk pnn pno pnp pns poc poe pok pon poo pop pos ppc ppe ppk ppn ppo ppp pps ps- psc pse psk psn pso psp pss scc sce sck scn sco scp scs se- sec see sek sen seo sep ses sk- skc ske skk sko skp sks snc sne snk snn sno snp sns soc soe sok son soo sop sos spc spe spk spn spo spp sps ss- ssc sse ssk ssn sso ssp sss