-ic a-a a-c a-i a-t aaa aac aag aai aak aar aas aat ac- aca acc acg aci ack acr acs act ag- aga agc agg agi agk agr ags agt ai- aia aic aig aii aik air ais ait aka akc akg aki akk akr aks ar- ara arc arg ari ark arr ars art as- asa asc asg asi ask asr ass ast at- ata atc atg ati atr ats att c-- caa cac cag cai cak car cas cat cca ccc ccg cci cck ccr ccs cct cga cgc cgg cgi cgr cgs cgt ci- cia cic cig cii cik cir cis cit cka ckc cki cks ckt cra crc crg cri crk crr crs crt csa csc csg csi csk csr css cst cta ctc ctg cti ctk ctr cts ctt gaa gac gag gai gak gar gas gat gca gcc gcg gci gck gcr gcs gct gga ggc ggg ggi ggr ggs ggt gia gic gig gii gik gir gis git gka gks gkt gra grc grg gri grk grr grs grt gsa gsc gsg gsi gsk gsr gss gst gta gtc gtg gti gtk gtr gts gtt ia- iaa iac iag iai iar ias iat ica icc icg ici ick icr ics ict iga igc igg igi igk igr igs igt iia iic iii iir iis iit ika ikc iki ikk ikr iks ikt ir- ira irc irg iri irk irr irs irt is- isa isc isg isi isk isr iss ist ita itc itg iti itk its itt k-t ka- kaa kac kag kai kak kar kas kat kca kcc kcg kci kck kcr kcs kct kga kgc kgi kgs kia kic kig kii kik kir kis kit kkc kki kkk kkr kks kkt kra krc krg kri krk krr krs krt ksa ksc ksg ksi ksk ksr kss kst kta ktc ktg ktk ktr kts ktt ra- raa rac rag rai rak rar ras rat rca rcc rcg rci rcr rcs rct rga rgc rgg rgi rgk rgr rgs rgt ria ric rig rii rik rir ris rit rkc rkg rkk rks rkt rra rrc rrg rri rrk rrr rrs rrt rsa rsc rsg rsi rsk rsr rss rst rta rtc rtg rti rtk rtr rts rtt saa sac sag sai sak sar sas sat sca scc scg sci sck scr scs sct sga sgc sgg sgi sgk sgr sgs sgt sia sic sig sii sik sir sis sit sk- ska skc skg ski skk skr sks skt sr- sra src srg sri srk srr srs srt ss- ssa ssc ssg ssi ssk ssr sss sst sta stc stg sti stk str sts stt taa tac tag tai tak tar tas tat tca tcc tcg tci tck tcr tcs tct tga tgc tgg tgi tgk tgr tgs tgt tia tic tig tii tik tir tis tit tka tkc tkg tkk tkr tks tkt tra trc trg tri trk trr trs trt tsa tsc tsg tsi tsk tsr tss tst tta ttc ttg tti ttk ttr tts ttt