c-- ccc cce cck ccn cco ccp ce- cec cee cek cen ceo cep ckc cko cn- cnc cne cnn cno cnp co- coc coe cok con coo cop cpc cpe cpk cpn cpo cpp ec- ecc ece eck ecn eco eec eee eek een eeo eep ekc eke eko ekp en- enc ene enk enn eno enp eo- eoc eoe eok eon eoo eop ep- epc epe epn epo epp kcc kce kck kcn kcp ke- kec kee kek ken keo kep kkc kke kkk kkn kkp kn- knc kne knk knn kno knp koc koe kok kon koo kop kpc kpe kpk kpn kpo kpp ncc nce nck ncn nco ncp ne- nec nee nek nen neo nep nkc nke nkk nkn nko nkp nnc nne nnk nnn nno nnp no- noc noe nok non noo nop npc npe npn npo npp oc- occ ock ocn oco ocp oec oee oen oeo oep okc oke okk oko okp on- onc one onk onn ono onp oo- ooc ook oon ooo oop op- opc ope opk opn opo opp p-p pcc pce pck pcn pco pcp pec pee pek pen peo pep pkc pke pkn pko pkp pn- pnc pne pnk pnn pno pnp poc poe pok pon poo pop ppc ppe ppk ppn ppo ppp