-th a-a a-c a-t aaa aac aae aah aan aat aax ac- aca acc ace ach acn act acx aea aec aee aeh aen aet aex aha ahc ahe ahh ahn aht ahx an- ana anc ane anh ann ant anx at- ata atc ate ath atn att atx ax- axa axe axh axn axt axx c-- caa cac cae cah can cat cax cca ccc cce cch ccn cct ccx ce- cea cec cee ceh cen cet cex ch- cha chc che chh chn cht chx cn- cna cnc cne cnh cnn cnt cnx cta ctc cte cth ctn ctt ctx cxc cxh cxt cxx eaa eac eae eah ean eat eax ec- eca ecc ece ech ecn ect ecx eea eec eee een eet eex eha ehc ehe ehh ehn eht en- ena enc ene enh enn ent eta etc ete eth etn ett etx ex- exa exc exe exh ext exx haa hac hae hah han hat hax hca hcc hce hch hcn hct he- hea hec hee heh hen het hex hha hhc hhe hhh hhn hht hna hnc hne hnh hnn hnt hta htc hte hth htn htt htx hxc naa nac nae nah nan nat nax nca ncc nce nch ncn nct ncx ne- nea nec nee neh nen net nex nha nhc nhe nhh nhn nht nna nnc nne nnh nnn nnt nta ntc nte nth ntn ntt ntx nxc nxt t-x taa tac tae tah tan tat tax tca tcc tce tch tcn tct tcx te- tea tec tee teh ten tet tex th- tha thc the thh thn tht thx tna tnc tne tnh tnn tnt tnx tta ttc tte tth ttn ttt ttx txe txn txt xaa xac xan xat xch xcx xee xen xet xex xht xna xnc xtc xtx xxx