-th a-a a-c a-t aaa aac aae aah aao aat aax ac- aca acc ace ach aco act acx aea aec aee aeh aeo aet aex aha ahc ahe ahh aho aht ahx aoa aoc aoe aoh aoo aot aox at- ata atc ate ath ato att atx ax- axa axe axh axo axt axx c-- caa cac cae cah cao cat cax cca ccc cce cch cco cct ccx ce- cea cec cee ceh ceo cet cex ch- cha chc che chh cho cht chx co- coa coc coe coh coo cot cox cta ctc cte cth cto ctt ctx cxc cxh cxo cxt cxx eaa eac eae eah eao eat eax ec- eca ecc ece ech eco ect ecx eea eec eee eeo eet eex eha ehc ehe ehh eho eht eo- eoa eoc eoe eoh eoo eot eta etc ete eth eto ett etx ex- exa exc exe exh exo ext exx haa hac hae hah hao hat hax hca hcc hce hch hco hct he- hea hec hee heh heo het hex hha hhc hhe hhh hho hht hoa hoc hoe hoh hoo hot hox hta htc hte hth hto htt htx hxc oaa oac oae oah oao oat oax oc- oca occ och oco oct ocx oea oec oee oeh oeo oet oex oha ohc ohe ohh oho oht oo- ooa ooc ooh ooo oot oox ot- ota otc ote oth oto ott ox- oxa oxc oxo oxt oxx t-x taa tac tae tah tao tat tax tca tcc tce tch tco tct tcx te- tea tec tee teh teo tet tex th- tha thc the thh tho tht thx to- toa toc toe toh too tot tox tta ttc tte tth tto ttt ttx txe txt xaa xac xat xch xcx xee xet xex xht xoa xoc xoo xot xox xtc xtx xxo xxx