-ic a-a a-c a-i aaa aac aaf aai aar aas ac- aca acc acf aci acr acs af- afa afc aff afi afr afs ai- aia aic aif aii air ais ar- ara arc arf ari arr ars as- asa asc asf asi asr ass c-- caa cac caf cai car cas cca ccc ccf cci ccr ccs cfa cfc cff cfi cfr cfs ci- cia cic cif cii cir cis cra crc crf cri crr crs csa csc csf csi csr css faa fac faf fai far fas fca fcc fcf fci fcr fcs ffa ffc fff ffi ffr ffs fia fic fif fii fir fis fra frc frf fri frr frs fsa fsc fsf fsi fsr fss i-f ia- iaa iac iaf iai iar ias ica icc icf ici icr ics ifa ifc iff ifi ifr ifs iia iic iif iii iir iis ir- ira irc irf iri irr irs is- isa isc isf isi isr iss ra- raa rac raf rai rar ras rca rcc rcf rci rcr rcs rfa rfc rff rfi rfr rfs ria ric rif rii rir ris rra rrc rrf rri rrr rrs rsa rsc rsf rsi rsr rss saa sac saf sai sar sas sca scc scf sci scr scs sfa sfc sff sfi sfr sfs sia sic sif sii sir sis sr- sra src srf sri srr srs ss- ssa ssc ssf ssi ssr sss