-ic c-- ccc cce cci cco ccp ccs ce- cec cee cei ceo cep ces ci- cic cie cii cio cip cis co- coc coe coi coo cop cos cpc cpe cpi cpo cpp cps csc cse csi cso csp css ec- ecc ece eci eco ecs eec eee eeo eep ees eic eie eii eio eip eis eo- eoc eoe eoi eoo eop eos ep- epc epe epi epo epp eps es- esc ese esi eso esp ess icc ice ici ico icp ics ie- iec iee iei iep ies iic iie iii iio iip iis io- ioc ioe ioi ioo iop ios ipc ipe ipi ipo ipp ips is- isc ise isi iso isp iss o-i oc- occ oci oco ocp ocs oec oee oei oeo oep oes oic oie oii oio oip ois oo- ooc ooi ooo oop oos op- opc ope opi opo opp ops os- osc ose osi oso osp oss p-p pcc pce pci pco pcp pcs pec pee pei peo pep pes pic pie pii pio pip pis poc poe poi poo pop pos ppc ppe ppi ppo ppp pps ps- psc pse psi pso psp pss scc sce sci sco scp scs se- sec see sei seo sep ses sic sie sii sio sip sis soc soe soi soo sop sos spc spe spi spo spp sps ss- ssc sse ssi sso ssp sss