-ic a-a a-c a-i aaa aac aai aao aap ac- aca acc aci aco acp ai- aia aic aii aio aip aoa aoc aoi aoo aop ap- apa apc api apo app c-- caa cac cai cao cap cca ccc cci cco ccp ci- cia cic cii cio cip co- coa coc coi coo cop cpa cpc cpi cpo cpp ia- iaa iac iai iao iap ica icc ici ico icp iia iic iii iio iip io- ioa ioc ioi ioo iop ipa ipc ipi ipo ipp o-i oaa oac oai oao oap oc- oca occ oci oco ocp oia oic oii oio oip oo- ooa ooc ooi ooo oop op- opa opc opi opo opp p-p paa pac pai pao pap pca pcc pci pco pcp pia pic pii pio pip poa poc poi poo pop ppa ppc ppi ppo ppp