-ic a-a a-c a-i a-t aaa aac aad aae aag aai aao aat aax ac- aca acc acd ace acg aci aco act acx ad- ada adc add ade adg adi ado adt adx aea aec aed aee aeg aei aeo aet aex ag- aga agc agd age agg agi ago agt agx ai- aia aic aid aie aig aii aio ait aix aoa aoc aod aoe aog aoi aoo aot aox at- ata atc atd ate atg ati ato att atx ax- axa axe axi axo axt axx c-- caa cac cad cae cag cai cao cat cax cca ccc ccd cce ccg cci cco cct ccx cda cdc cdd cde cdg cdi cdo cdt cdx ce- cea cec ced cee ceg cei ceo cet cex cga cgc cgd cge cgg cgi cgo cgt ci- cia cic cid cie cig cii cio cit cix co- coa coc cod coe cog coi coo cot cox cta ctc ctd cte ctg cti cto ctt ctx cxc cxi cxo cxt cxx daa dac dad dae dag dai dao dat dax dca dcc dcd dce dcg dci dco dct dcx dda ddc ddd dde ddg ddi ddo ddt ddx de- dea dec ded dee deg dei deo det dex dga dgc dgd dge dgg dgi dgt di- dia dic did die dig dii dio dit dix doa doc dod doe dog doi doo dot dox dta dtc dtd dte dtg dti dto dtt dtx dxc dxd dxi dxo dxt dxx eaa eac ead eae eag eai eao eat eax ec- eca ecc ecd ece ecg eci eco ect ecx ed- eda edc edd ede edg edi edo edt edx eea eec eed eee eeg eeo eet eex ega egc egd ege egg egi ego egt egx eia eic eid eie eig eii eio eit eix eo- eoa eoc eod eoe eog eoi eoo eot eta etc etd ete etg eti eto ett etx ex- exa exc exd exe exi exo ext exx g-d gaa gac gad gae gag gai gao gat gca gcc gcd gce gcg gci gco gct gda gdc gdd gde gdi gdo gdt gdx ge- gea gec ged gee geg gei geo get gex gga ggc ggd ggg ggi ggo ggt gia gic gid gie gig gii gio git goa goc god goe gog goi goo got gox gta gtc gtd gte gtg gti gto gtt gtx gxa gxt i-d ia- iaa iac iad iae iag iai iao iat ica icc icd ice icg ici ico ict ida idc idd ide idg idi ido idt idx ie- iea iec ied iee ieg iei iet iex iga igc igd ige igg igi igo igt iia iic iid iie iii iio iit iix io- ioa ioc iod ioe iog ioi ioo iot ita itc itd ite itg iti ito itt itx ixc ixe ixi o-i oaa oac oad oae oag oai oao oat oax oc- oca occ ocd ocg oci oco oct ocx oda odc odd ode odg odi odo odt oea oec oed oee oeg oei oeo oet oex oga ogc ogd oge ogg ogi ogo ogt ogx oia oic oid oie oii oio oit oo- ooa ooc ood oog ooi ooo oot oox ot- ota otc otd ote otg oti oto ott ox- oxa oxc oxi oxo oxt oxx t-x taa tac tad tae tag tai tao tat tax tca tcc tcd tce tcg tci tco tct tcx tda tdc tdd tde tdg tdi tdo tdt tdx te- tea tec ted tee teg tei teo tet tex tga tgc tge tgg tgi tgo tgt tia tic tid tie tig tii tio tit tix to- toa toc tod toe tog toi too tot tox tta ttc ttd tte ttg tti tto ttt ttx txe txi txt xaa xac xad xag xat xcd xci xcx xda xdc xde xdi xdt xed xee xeg xet xex xge xgi xia xic xie xii xio xit xix xoa xoc xod xog xoi xoo xot xox xtc xti xtx xxi xxo xxx