-ic a-a a-c a-i aaa aac aaf aag aai aar ac- aca acc acf acg aci acr af- afa afc aff afg afi afr ag- aga agc agf agg agi agr ai- aia aic aif aig aii air ar- ara arc arf arg ari arr c-- caa cac caf cag cai car cca ccc ccf ccg cci ccr cfa cfc cff cfg cfi cfr cga cgc cgg cgi cgr ci- cia cic cif cig cii cir cra crc crf crg cri crr faa fac faf fag fai far fca fcc fcf fcg fci fcr ffa ffc fff ffg ffi ffr fga fgc fgf fgg fgi fgr fia fic fif fig fii fir fra frc frf frg fri frr gaa gac gaf gag gai gar gca gcc gcf gcg gci gcr gfa gfc gff gfi gfr gga ggc ggg ggi ggr gia gic gif gig gii gir gra grc grf grg gri grr i-f ia- iaa iac iaf iag iai iar ica icc icf icg ici icr ifa ifc iff ifg ifi ifr iga igc igf igg igi igr iia iic iif iii iir ir- ira irc irf irg iri irr ra- raa rac raf rag rai rar rca rcc rcf rcg rci rcr rfa rfc rff rfg rfi rfr rga rgc rgf rgg rgi rgr ria ric rif rig rii rir rra rrc rrf rrg rri rrr