-ic a-a a-c a-i aaa aac aai aap aar aas ac- aca acc aci acp acr acs ai- aia aic aii aip air ais ap- apa apc api app apr aps ar- ara arc ari arp arr ars as- asa asc asi asp asr ass c-- caa cac cai cap car cas cca ccc cci ccp ccr ccs ci- cia cic cii cip cir cis cpa cpc cpi cpp cpr cps cra crc cri crp crr crs csa csc csi csp csr css ia- iaa iac iai iap iar ias ica icc ici icp icr ics iia iic iii iip iir iis ipa ipc ipi ipp ipr ips ir- ira irc iri irp irr irs is- isa isc isi isp isr iss p-p paa pac pai pap par pas pca pcc pci pcp pcr pcs pia pic pii pip pir pis ppa ppc ppi ppp ppr pps pra prc pri prp prr prs ps- psa psc psi psp psr pss ra- raa rac rai rap rar ras rca rcc rci rcp rcr rcs ria ric rii rip rir ris rpa rpc rpi rpp rpr rps rra rrc rri rrp rrr rrs rsa rsc rsi rsp rsr rss saa sac sai sap sar sas sca scc sci scp scr scs sia sic sii sip sir sis spa spc spi spp spr sps sr- sra src sri srp srr srs ss- ssa ssc ssi ssp ssr sss