-ic a-a a-c a-i a-t aaa aac aae aag aai aan aao aat aax ac- aca acc ace acg aci acn aco act acx aea aec aee aeg aei aen aeo aet aex ag- aga agc age agg agi agn ago agt agx ai- aia aic aie aig aii ain aio ait aix an- ana anc ane ang ani ann ano ant anx aoa aoc aoe aog aoi aon aoo aot aox at- ata atc ate atg ati atn ato att atx ax- axa axe axi axn axo axt axx c-- caa cac cae cag cai can cao cat cax cca ccc cce ccg cci ccn cco cct ccx ce- cea cec cee ceg cei cen ceo cet cex cga cgc cge cgg cgi cgn cgo cgt ci- cia cic cie cig cii cin cio cit cix cn- cna cnc cne cng cni cnn cno cnt cnx co- coa coc coe cog coi con coo cot cox cta ctc cte ctg cti ctn cto ctt ctx cxc cxi cxo cxt cxx eaa eac eae eag eai ean eao eat eax ec- eca ecc ece ecg eci ecn eco ect ecx eea eec eee eeg een eeo eet eex ega egc ege egg egi egn ego egt egx eia eic eie eig eii ein eio eit eix en- ena enc ene eng eni enn eno ent eo- eoa eoc eoe eog eoi eon eoo eot eta etc ete etg eti etn eto ett etx ex- exa exc exe exi exo ext exx gaa gac gae gag gai gan gao gat gca gcc gce gcg gci gcn gco gct ge- gea gec gee geg gei gen geo get gex gga ggc ggg ggi ggn ggo ggt gia gic gie gig gii gin gio git gna gnc gne gni gnn gno gnt goa goc goe gog goi gon goo got gox gta gtc gte gtg gti gtn gto gtt gtx gxa gxt ia- iaa iac iae iag iai ian iao iat ica icc ice icg ici icn ico ict ie- iea iec iee ieg iei ien iet iex iga igc ige igg igi ign igo igt iia iic iie iii iin iio iit iix in- ina inc ine ing ini inn ino int inx io- ioa ioc ioe iog ioi ion ioo iot ita itc ite itg iti itn ito itt itx ixc ixe ixi ixn n-i naa nac nae nag nai nan nao nat nax nca ncc nce ncg nci ncn nco nct ncx ne- nea nec nee neg nei nen neo net nex nga ngc nge ngg ngi ngn ngo ngt nia nic nie nig nii nin nio nit nix nna nnc nne nng nni nnn nno nnt no- noa noc noe nog noi non noo not nox nta ntc nte ntg nti ntn nto ntt ntx nxc nxt o-i oaa oac oae oag oai oan oao oat oax oc- oca occ ocg oci ocn oco oct ocx oea oec oee oeg oei oen oeo oet oex oga ogc oge ogg ogi ogn ogo ogt ogx oia oic oie oii oin oio oit on- ona onc one ong oni onn ono ont onx oo- ooa ooc oog ooi oon ooo oot oox ot- ota otc ote otg oti otn oto ott ox- oxa oxc oxi oxn oxo oxt oxx t-x taa tac tae tag tai tan tao tat tax tca tcc tce tcg tci tcn tco tct tcx te- tea tec tee teg tei ten teo tet tex tga tgc tge tgg tgi tgn tgo tgt tia tic tie tig tii tin tio tit tix tna tnc tne tng tni tnn tno tnt tnx to- toa toc toe tog toi ton too tot tox tta ttc tte ttg tti ttn tto ttt ttx txe txi txn txt xaa xac xag xan xat xci xcx xee xeg xen xet xex xge xgi xia xic xie xii xin xio xit xix xna xnc xno xoa xoc xog xoi xon xoo xot xox xtc xti xtx xxi xxo xxx