a-a a-c a-t a-z aaa aac aao aat aau aaz ac- aca acc aco act acu acz aoa aoc aoo aot aou at- ata atc ato att atu atz au- aua auc auo aut auz az- aza azo azt azu azz c-- caa cac cao cat cau caz cca ccc cco cct ccu ccz co- coa coc coo cot cou coz cta ctc cto ctt ctu ctz cua cuc cuo cut cuu cuz cz- czc czo czt oaa oac oao oat oau oc- oca occ oco oct ocu ocz oo- ooa ooc ooo oot ot- ota otc oto ott otu otz ou- oua ouc ouo out oza ozo ozt ozu ozz taa tac tao tat tau taz tca tcc tco tct tcu to- toa toc too tot tou toz tta ttc tto ttt ttu tua tuc tuo tut tuu tuz tza tzu ua- uaa uac uao uat uau uaz uca ucc uco uct ucu uoa uoc uoo uot uta utc uto utt utu utz uua uuc uut uuu uza uzo uzu zaa zac zao zat zaz zco zo- zoa zoc zoo zot zou zta zuc zut zuz zzt zzz