-ic c-- ccc cce cci cck cco ccp ce- cec cee cei cek ceo cep ci- cic cie cii cik cio cip ckc cki cko co- coc coe coi cok coo cop cpc cpe cpi cpk cpo cpp ec- ecc ece eci eck eco eec eee eek eeo eep eic eie eii eik eio eip ekc eke eki eko ekp eo- eoc eoe eoi eok eoo eop ep- epc epe epi epo epp icc ice ici ick ico icp ie- iec iee iei iek iep iic iie iii iio iip ikc ike iki ikk iko io- ioc ioe ioi ioo iop ipc ipe ipi ipo ipp kcc kce kci kck kcp ke- kec kee kei kek keo kep kic kie kii kik kio kip kkc kke kki kkk kkp koc koe koi kok koo kop kpc kpe kpi kpk kpo kpp o-i oc- occ oci ock oco ocp oec oee oei oeo oep oic oie oii oik oio oip okc oke oki okk oko okp oo- ooc ooi ook ooo oop op- opc ope opi opk opo opp p-p pcc pce pci pck pco pcp pec pee pei pek peo pep pic pie pii pik pio pip pkc pke pki pko pkp poc poe poi pok poo pop ppc ppe ppi ppk ppo ppp