-ic a-a a-c a-i aaa aac aag aai aak aar aas ac- aca acc acg aci ack acr acs ag- aga agc agg agi agk agr ags ai- aia aic aig aii aik air ais aka akc akg aki akk akr aks ar- ara arc arg ari ark arr ars as- asa asc asg asi ask asr ass c-- caa cac cag cai cak car cas cca ccc ccg cci cck ccr ccs cga cgc cgg cgi cgr cgs ci- cia cic cig cii cik cir cis cka ckc cki cks cra crc crg cri crk crr crs csa csc csg csi csk csr css gaa gac gag gai gak gar gas gca gcc gcg gci gck gcr gcs gga ggc ggg ggi ggr ggs gia gic gig gii gik gir gis gka gks gra grc grg gri grk grr grs gsa gsc gsg gsi gsk gsr gss ia- iaa iac iag iai iar ias ica icc icg ici ick icr ics iga igc igg igi igk igr igs iia iic iii iir iis ika ikc iki ikk ikr iks ir- ira irc irg iri irk irr irs is- isa isc isg isi isk isr iss ka- kaa kac kag kai kak kar kas kca kcc kcg kci kck kcr kcs kga kgc kgi kgs kia kic kig kii kik kir kis kkc kki kkk kkr kks kra krc krg kri krk krr krs ksa ksc ksg ksi ksk ksr kss ra- raa rac rag rai rak rar ras rca rcc rcg rci rcr rcs rga rgc rgg rgi rgk rgr rgs ria ric rig rii rik rir ris rkc rkg rkk rks rra rrc rrg rri rrk rrr rrs rsa rsc rsg rsi rsk rsr rss saa sac sag sai sak sar sas sca scc scg sci sck scr scs sga sgc sgg sgi sgk sgr sgs sia sic sig sii sik sir sis sk- ska skc skg ski skk skr sks sr- sra src srg sri srk srr srs ss- ssa ssc ssg ssi ssk ssr sss