-ic a-a a-c a-i a-t aaa aac aag aai aao aar aas aat ac- aca acc acg aci aco acr acs act ag- aga agc agg agi ago agr ags agt ai- aia aic aig aii aio air ais ait aoa aoc aog aoi aoo aor aos aot ar- ara arc arg ari aro arr ars art as- asa asc asg asi aso asr ass ast at- ata atc atg ati ato atr ats att c-- caa cac cag cai cao car cas cat cca ccc ccg cci cco ccr ccs cct cga cgc cgg cgi cgo cgr cgs cgt ci- cia cic cig cii cio cir cis cit co- coa coc cog coi coo cor cos cot cra crc crg cri cro crr crs crt csa csc csg csi cso csr css cst cta ctc ctg cti cto ctr cts ctt gaa gac gag gai gao gar gas gat gca gcc gcg gci gco gcr gcs gct gga ggc ggg ggi ggo ggr ggs ggt gia gic gig gii gio gir gis git goa goc gog goi goo gor gos got gra grc grg gri gro grr grs grt gsa gsc gsg gsi gso gsr gss gst gta gtc gtg gti gto gtr gts gtt ia- iaa iac iag iai iao iar ias iat ica icc icg ici ico icr ics ict iga igc igg igi igo igr igs igt iia iic iii iio iir iis iit io- ioa ioc iog ioi ioo ior ios iot ir- ira irc irg iri iro irr irs irt is- isa isc isg isi iso isr iss ist ita itc itg iti ito its itt o-i oaa oac oag oai oao oar oas oat oc- oca occ ocg oci oco ocr ocs oct oga ogc ogg ogi ogo ogs ogt oia oic oii oio oir ois oit oo- ooa ooc oog ooi ooo oor oos oot or- ora orc org ori oro orr ors ort os- osa osc osg osi oso osr oss ost ot- ota otc otg oti oto otr ots ott ra- raa rac rag rai rao rar ras rat rca rcc rcg rci rco rcr rcs rct rga rgc rgg rgi rgo rgr rgs rgt ria ric rig rii rio rir ris rit roa roc rog roi roo ror ros rot rra rrc rrg rri rrr rrs rrt rsa rsc rsg rsi rso rsr rss rst rta rtc rtg rti rto rtr rts rtt saa sac sag sai sao sar sas sat sca scc scg sci sco scr scs sct sga sgc sgg sgi sgo sgr sgs sgt sia sic sig sii sio sir sis sit soa soc sog soi soo sor sos sot sr- sra src srg sri sro srr srs srt ss- ssa ssc ssg ssi sso ssr sss sst sta stc stg sti sto str sts stt taa tac tag tai tao tar tas tat tca tcc tcg tci tco tcr tcs tct tga tgc tgg tgi tgo tgr tgs tgt tia tic tig tii tio tir tis tit to- toa toc tog toi too tor tos tot tra trc trg tri tro trr trs trt tsa tsc tsg tsi tso tsr tss tst tta ttc ttg tti tto ttr tts ttt