-ic a-a a-c a-i aaa aac aag aai aar aas ac- aca acc acg aci acr acs ag- aga agc agg agi agr ags ai- aia aic aig aii air ais ar- ara arc arg ari arr ars as- asa asc asg asi asr ass c-- caa cac cag cai car cas cca ccc ccg cci ccr ccs cga cgc cgg cgi cgr cgs ci- cia cic cig cii cir cis cra crc crg cri crr crs csa csc csg csi csr css gaa gac gag gai gar gas gca gcc gcg gci gcr gcs gga ggc ggg ggi ggr ggs gia gic gig gii gir gis gra grc grg gri grr grs gsa gsc gsg gsi gsr gss ia- iaa iac iag iai iar ias ica icc icg ici icr ics iga igc igg igi igr igs iia iic iii iir iis ir- ira irc irg iri irr irs is- isa isc isg isi isr iss ra- raa rac rag rai rar ras rca rcc rcg rci rcr rcs rga rgc rgg rgi rgr rgs ria ric rig rii rir ris rra rrc rrg rri rrr rrs rsa rsc rsg rsi rsr rss saa sac sag sai sar sas sca scc scg sci scr scs sga sgc sgg sgi sgr sgs sia sic sig sii sir sis sr- sra src srg sri srr srs ss- ssa ssc ssg ssi ssr sss