-al -ic -ol a-a a-c a-i a-t aaa aac aag aai aal aao aat aax ac- aca acc acg aci acl aco act acx ag- aga agc agg agi agl ago agt agx ai- aia aic aig aii ail aio ait aix al- ala alc alg ali all alo alt alx aoa aoc aog aoi aol aoo aot aox at- ata atc atg ati atl ato att atx ax- axa axi axl axo axt axx c-- caa cac cag cai cal cao cat cax cca ccc ccg cci ccl cco cct ccx cga cgc cgg cgi cgl cgo cgt ci- cia cic cig cii cil cio cit cix cl- cla clc clg cli cll clo clt clx co- coa coc cog coi col coo cot cox cta ctc ctg cti ctl cto ctt ctx cxc cxi cxl cxo cxt cxx gaa gac gag gai gal gao gat gca gcc gcg gci gcl gco gct gga ggc ggg ggi ggo ggt gia gic gig gii gil gio git gla glc glg gli gll glo glt glx goa goc gog goi gol goo got gox gta gtc gtg gti gtl gto gtt gtx gxa gxl gxt ia- iaa iac iag iai ial iao iat ica icc icg ici icl ico ict iga igc igg igi igl igo igt iia iic iii iil iio iit iix il- ila ilc ilg ili ill ilo ilt ilx io- ioa ioc iog ioi iol ioo iot ita itc itg iti itl ito itt itx ixc ixi ixl la- laa lac lag lai lal lao lat lax lca lcc lcg lci lcl lco lct lcx lga lgc lgg lgi lgl lgo lgt lia lic lig lii lil lio lit lix lla llc llg lli lll llo llt loa loc log loi lol loo lot lox lta ltc ltg lti ltl lto ltt ltx lxc lxi lxo lxx o-i oaa oac oag oai oal oao oat oax oc- oca occ ocg oci ocl oco oct ocx oga ogc ogg ogi ogl ogo ogt ogx oia oic oii oil oio oit ola olc olg oli oll olo olt oo- ooa ooc oog ooi ool ooo oot oox ot- ota otc otg oti otl oto ott ox- oxa oxc oxi oxo oxt oxx t-x taa tac tag tai tal tao tat tax tca tcc tcg tci tcl tco tct tcx tga tgc tgg tgi tgl tgo tgt tia tic tig tii til tio tit tix tla tlc tlg tli tll tlo tlt tlx to- toa toc tog toi tol too tot tox tta ttc ttg tti ttl tto ttt ttx txi txl txt xaa xac xag xal xat xci xcl xcx xgi xgl xia xic xii xio xit xix xla xlg xli xlt xoa xoc xog xoi xoo xot xox xtc xti xtx xxi xxl xxo xxx