-ic a-a a-c a-i aaa aac aae aai aao aap ac- aca acc ace aci aco acp aea aec aee aei aeo aep ai- aia aic aie aii aio aip aoa aoc aoe aoi aoo aop ap- apa apc ape api apo app c-- caa cac cae cai cao cap cca ccc cce cci cco ccp ce- cea cec cee cei ceo cep ci- cia cic cie cii cio cip co- coa coc coe coi coo cop cpa cpc cpe cpi cpo cpp eaa eac eae eai eao eap ec- eca ecc ece eci eco eea eec eee eeo eep eia eic eie eii eio eip eo- eoa eoc eoe eoi eoo eop ep- epa epc epe epi epo epp ia- iaa iac iae iai iao iap ica icc ice ici ico icp ie- iea iec iee iei iep iia iic iie iii iio iip io- ioa ioc ioe ioi ioo iop ipa ipc ipe ipi ipo ipp o-i oaa oac oae oai oao oap oc- oca occ oci oco ocp oea oec oee oei oeo oep oia oic oie oii oio oip oo- ooa ooc ooi ooo oop op- opa opc ope opi opo opp p-p paa pac pae pai pao pap pca pcc pce pci pco pcp pea pec pee pei peo pep pia pic pie pii pio pip poa poc poe poi poo pop ppa ppc ppe ppi ppo ppp