-ic a-a a-c a-i aaa aac aag aai aao aas ac- aca acc acg aci aco acs ag- aga agc agg agi ago ags ai- aia aic aig aii aio ais aoa aoc aog aoi aoo aos as- asa asc asg asi aso ass c-- caa cac cag cai cao cas cca ccc ccg cci cco ccs cga cgc cgg cgi cgo cgs ci- cia cic cig cii cio cis co- coa coc cog coi coo cos csa csc csg csi cso css gaa gac gag gai gao gas gca gcc gcg gci gco gcs gga ggc ggg ggi ggo ggs gia gic gig gii gio gis goa goc gog goi goo gos gsa gsc gsg gsi gso gss ia- iaa iac iag iai iao ias ica icc icg ici ico ics iga igc igg igi igo igs iia iic iii iio iis io- ioa ioc iog ioi ioo ios is- isa isc isg isi iso iss o-i oaa oac oag oai oao oas oc- oca occ ocg oci oco ocs oga ogc ogg ogi ogo ogs oia oic oii oio ois oo- ooa ooc oog ooi ooo oos os- osa osc osg osi oso oss saa sac sag sai sao sas sca scc scg sci sco scs sga sgc sgg sgi sgo sgs sia sic sig sii sio sis soa soc sog soi soo sos ss- ssa ssc ssg ssi sso sss