a-a a-c a-t a-z aaa aac aae aat aau aaz ac- aca acc ace act acu acz aea aec aee aet aeu aez at- ata atc ate att atu atz au- aua auc aue aut auz az- aza aze azt azu azz c-- caa cac cae cat cau caz cca ccc cce cct ccu ccz ce- cea cec cee cet ceu cez cta ctc cte ctt ctu ctz cua cuc cue cut cuu cuz cz- czc cze czt eaa eac eae eat eau eaz ec- eca ecc ece ect ecu eea eec eee eet eta etc ete ett etu etz eu- eua euc eue eut eze ezz taa tac tae tat tau taz tca tcc tce tct tcu te- tea tec tee tet teu tez tta ttc tte ttt ttu tua tuc tue tut tuu tuz tza tze tzu ua- uaa uac uae uat uau uaz uca ucc uce uct ucu uea uec uee uet uta utc ute utt utu utz uua uuc uue uut uuu uza uzu zaa zac zat zaz zce zea zec zee zet zez zta zte zuc zut zuz zzt zzz