-ic a-a a-c a-i aaa aac aai aao aap aar aas ac- aca acc aci aco acp acr acs ai- aia aic aii aio aip air ais aoa aoc aoi aoo aop aor aos ap- apa apc api apo app apr aps ar- ara arc ari aro arp arr ars as- asa asc asi aso asp asr ass c-- caa cac cai cao cap car cas cca ccc cci cco ccp ccr ccs ci- cia cic cii cio cip cir cis co- coa coc coi coo cop cor cos cpa cpc cpi cpo cpp cpr cps cra crc cri cro crp crr crs csa csc csi cso csp csr css ia- iaa iac iai iao iap iar ias ica icc ici ico icp icr ics iia iic iii iio iip iir iis io- ioa ioc ioi ioo iop ior ios ipa ipc ipi ipo ipp ipr ips ir- ira irc iri iro irp irr irs is- isa isc isi iso isp isr iss o-i oaa oac oai oao oap oar oas oc- oca occ oci oco ocp ocr ocs oia oic oii oio oip oir ois oo- ooa ooc ooi ooo oop oor oos op- opa opc opi opo opp opr ops or- ora orc ori oro orp orr ors os- osa osc osi oso osp osr oss p-p paa pac pai pao pap par pas pca pcc pci pco pcp pcr pcs pia pic pii pio pip pir pis poa poc poi poo pop por pos ppa ppc ppi ppo ppp ppr pps pra prc pri pro prp prr prs ps- psa psc psi pso psp psr pss ra- raa rac rai rao rap rar ras rca rcc rci rco rcp rcr rcs ria ric rii rio rip rir ris roa roc roi roo rop ror ros rpa rpc rpi rpo rpp rpr rps rra rrc rri rrp rrr rrs rsa rsc rsi rso rsp rsr rss saa sac sai sao sap sar sas sca scc sci sco scp scr scs sia sic sii sio sip sir sis soa soc soi soo sop sor sos spa spc spi spo spp spr sps sr- sra src sri sro srp srr srs ss- ssa ssc ssi sso ssp ssr sss