a-a a-c a-t a-z aaa aac aae aao aat aaz ac- aca acc ace aco act acz aea aec aee aeo aet aez aoa aoc aoe aoo aot at- ata atc ate ato att atz az- aza aze azo azt azz c-- caa cac cae cao cat caz cca ccc cce cco cct ccz ce- cea cec cee ceo cet cez co- coa coc coe coo cot coz cta ctc cte cto ctt ctz cz- czc cze czo czt eaa eac eae eao eat eaz ec- eca ecc ece eco ect eea eec eee eeo eet eo- eoa eoc eoe eoo eot eta etc ete eto ett etz eze ezo ezz oaa oac oae oao oat oc- oca occ oco oct ocz oea oec oee oeo oet oo- ooa ooc ooo oot ot- ota otc ote oto ott otz oza oze ozo ozt ozz taa tac tae tao tat taz tca tcc tce tco tct te- tea tec tee teo tet tez to- toa toc toe too tot toz tta ttc tte tto ttt tza tze zaa zac zao zat zaz zce zco zea zec zee zeo zet zez zo- zoa zoc zoe zoo zot zta zte zzt zzz