-ic a-a a-c a-i aaa aac aag aai aas ac- aca acc acg aci acs ag- aga agc agg agi ags ai- aia aic aig aii ais as- asa asc asg asi ass c-- caa cac cag cai cas cca ccc ccg cci ccs cga cgc cgg cgi cgs ci- cia cic cig cii cis csa csc csg csi css gaa gac gag gai gas gca gcc gcg gci gcs gga ggc ggg ggi ggs gia gic gig gii gis gsa gsc gsg gsi gss ia- iaa iac iag iai ias ica icc icg ici ics iga igc igg igi igs iia iic iii iis is- isa isc isg isi iss saa sac sag sai sas sca scc scg sci scs sga sgc sgg sgi sgs sia sic sig sii sis ss- ssa ssc ssg ssi sss