-ey a-a a-c a-t aaa aac aae aao aat aax aay ac- aca acc ace aco act acx acy aea aec aee aeo aet aex aey aoa aoc aoe aoo aot aox at- ata atc ate ato att atx ax- axa axe axo axt axx ay- aya ayc aye ayo ayt ayx c-- caa cac cae cao cat cax cay cca ccc cce cco cct ccx ce- cea cec cee ceo cet cex cey co- coa coc coe coo cot cox coy cta ctc cte cto ctt ctx cty cxc cxo cxt cxx cya cyc cye cyo cyt eaa eac eae eao eat eax ec- eca ecc ece eco ect ecx eea eec eee eeo eet eex eey eo- eoa eoc eoe eoo eot eta etc ete eto ett etx ety ex- exa exc exe exo ext exx exy eya eyc eye eyo eyt oaa oac oae oao oat oax oc- oca occ oco oct ocx oea oec oee oeo oet oex oey oo- ooa ooc ooo oot oox ot- ota otc ote oto ott ox- oxa oxc oxo oxt oxx oxy oya oye oyo t-x taa tac tae tao tat tax tay tca tcc tce tco tct tcx te- tea tec tee teo tet tex tey to- toa toc toe too tot tox toy tta ttc tte tto ttt ttx tty txe txt tya tyc tye tyo tyt xaa xac xat xcx xee xet xex xoa xoc xoo xot xox xtc xtx xty xxo xxx xxy xyy yaa yac yae yao yat yax yay yca ycc yce yco ycy yea yec yee yeo yet yex yey yoc yoe yoo yot yox yoy yta ytc yte yto ytt yxa yxe yxy yyc yye yyt yyy