-ic a-a a-c a-i a-t aaa aac aae aag aai aak aas aat ac- aca acc ace acg aci ack acs act aea aec aee aeg aei aek aes aet ag- aga agc age agg agi agk ags agt ai- aia aic aie aig aii aik ais ait aka akc ake akg aki akk aks as- asa asc ase asg asi ask ass ast at- ata atc ate atg ati ats att c-- caa cac cae cag cai cak cas cat cca ccc cce ccg cci cck ccs cct ce- cea cec cee ceg cei cek ces cet cga cgc cge cgg cgi cgs cgt ci- cia cic cie cig cii cik cis cit cka ckc cki cks ckt csa csc cse csg csi csk css cst cta ctc cte ctg cti ctk cts ctt eaa eac eae eag eai eak eas eat ec- eca ecc ece ecg eci eck ecs ect eea eec eee eeg eek ees eet ega egc ege egg egi egs egt eia eic eie eig eii eik eis eit eka ekc eke ekg eki eks ekt es- esa esc ese esg esi esk ess est eta etc ete etg eti etk ets ett gaa gac gae gag gai gak gas gat gca gcc gce gcg gci gck gcs gct ge- gea gec gee geg gei gek ges get gga ggc ggg ggi ggs ggt gia gic gie gig gii gik gis git gka gks gkt gsa gsc gse gsg gsi gsk gss gst gta gtc gte gtg gti gtk gts gtt ia- iaa iac iae iag iai ias iat ica icc ice icg ici ick ics ict ie- iea iec iee ieg iei iek ies iet iga igc ige igg igi igk igs igt iia iic iie iii iis iit ika ikc ike iki ikk iks ikt is- isa isc ise isg isi isk iss ist ita itc ite itg iti itk its itt k-t ka- kaa kac kae kag kai kak kas kat kca kcc kce kcg kci kck kcs kct ke- kea kec kee keg kei kek kes ket kga kgc kgi kgs kia kic kie kig kii kik kis kit kkc kke kki kkk kks kkt ksa ksc kse ksg ksi ksk kss kst kta ktc kte ktg ktk kts ktt saa sac sae sag sai sak sas sat sca scc sce scg sci sck scs sct se- sea sec see seg sei sek ses set sga sgc sge sgg sgi sgk sgs sgt sia sic sie sig sii sik sis sit sk- ska skc ske skg ski skk sks skt ss- ssa ssc sse ssg ssi ssk sss sst sta stc ste stg sti stk sts stt taa tac tae tag tai tak tas tat tca tcc tce tcg tci tck tcs tct te- tea tec tee teg tei tek tes tet tga tgc tge tgg tgi tgk tgs tgt tia tic tie tig tii tik tis tit tka tkc tke tkg tkk tks tkt tsa tsc tse tsg tsi tsk tss tst tta ttc tte ttg tti ttk tts ttt