-ic a-a a-c a-i aaa aac aai aao aas ac- aca acc aci aco acs ai- aia aic aii aio ais aoa aoc aoi aoo aos as- asa asc asi aso ass c-- caa cac cai cao cas cca ccc cci cco ccs ci- cia cic cii cio cis co- coa coc coi coo cos csa csc csi cso css ia- iaa iac iai iao ias ica icc ici ico ics iia iic iii iio iis io- ioa ioc ioi ioo ios is- isa isc isi iso iss o-i oaa oac oai oao oas oc- oca occ oci oco ocs oia oic oii oio ois oo- ooa ooc ooi ooo oos os- osa osc osi oso oss saa sac sai sao sas sca scc sci sco scs sia sic sii sio sis soa soc soi soo sos ss- ssa ssc ssi sso sss