-ic a-a a-c a-i aaa aac aai aao aar aas ac- aca acc aci aco acr acs ai- aia aic aii aio air ais aoa aoc aoi aoo aor aos ar- ara arc ari aro arr ars as- asa asc asi aso asr ass c-- caa cac cai cao car cas cca ccc cci cco ccr ccs ci- cia cic cii cio cir cis co- coa coc coi coo cor cos cra crc cri cro crr crs csa csc csi cso csr css ia- iaa iac iai iao iar ias ica icc ici ico icr ics iia iic iii iio iir iis io- ioa ioc ioi ioo ior ios ir- ira irc iri iro irr irs is- isa isc isi iso isr iss o-i oaa oac oai oao oar oas oc- oca occ oci oco ocr ocs oia oic oii oio oir ois oo- ooa ooc ooi ooo oor oos or- ora orc ori oro orr ors os- osa osc osi oso osr oss ra- raa rac rai rao rar ras rca rcc rci rco rcr rcs ria ric rii rio rir ris roa roc roi roo ror ros rra rrc rri rrr rrs rsa rsc rsi rso rsr rss saa sac sai sao sar sas sca scc sci sco scr scs sia sic sii sio sir sis soa soc soi soo sor sos sr- sra src sri sro srr srs ss- ssa ssc ssi sso ssr sss