-ic a-a a-c a-i aaa aac aai aao aap aas ac- aca acc aci aco acp acs ai- aia aic aii aio aip ais aoa aoc aoi aoo aop aos ap- apa apc api apo app aps as- asa asc asi aso asp ass c-- caa cac cai cao cap cas cca ccc cci cco ccp ccs ci- cia cic cii cio cip cis co- coa coc coi coo cop cos cpa cpc cpi cpo cpp cps csa csc csi cso csp css ia- iaa iac iai iao iap ias ica icc ici ico icp ics iia iic iii iio iip iis io- ioa ioc ioi ioo iop ios ipa ipc ipi ipo ipp ips is- isa isc isi iso isp iss o-i oaa oac oai oao oap oas oc- oca occ oci oco ocp ocs oia oic oii oio oip ois oo- ooa ooc ooi ooo oop oos op- opa opc opi opo opp ops os- osa osc osi oso osp oss p-p paa pac pai pao pap pas pca pcc pci pco pcp pcs pia pic pii pio pip pis poa poc poi poo pop pos ppa ppc ppi ppo ppp pps ps- psa psc psi pso psp pss saa sac sai sao sap sas sca scc sci sco scp scs sia sic sii sio sip sis soa soc soi soo sop sos spa spc spi spo spp sps ss- ssa ssc ssi sso ssp sss