-th a-a a-b a-c a-t a-z aaa aab aac aae aah aat aaz ab- aba abb abc abe abh abt abz ac- aca acb acc ace ach act acz aea aeb aec aee aeh aet aez aha ahb ahc ahe ahh aht ahz at- ata atb atc ate ath att atz az- aza azb aze azt azz baa bab bac bae bah bat baz bba bbb bbc bbe bbh bbt bca bcb bcc bce bch bct bcz be- bea beb bec bee beh bet bez bha bhb bhc bhe bhh bht bta btb btc bte bth btt btz bza bze bzh bzz c-- caa cab cac cae cah cat caz cba cbb cbc cbe cbh cbt cbz cca ccb ccc cce cch cct ccz ce- cea ceb cec cee ceh cet cez ch- cha chb chc che chh cht chz cta ctb ctc cte cth ctt ctz cz- czc cze czt eaa eab eac eae eah eat eaz eba ebb ebc ebe ebh ebt ec- eca ecb ecc ece ech ect eea eeb eec eee eet eha ehb ehc ehe ehh eht eta etb etc ete eth ett etz eze ezh ezz haa hab hac hae hah hat haz hba hbb hbc hbe hbh hbt hbz hca hcb hcc hce hch hct he- hea heb hec hee heh het hez hha hhb hhc hhe hhh hht hhz hta htb htc hte hth htt htz hze hzt taa tab tac tae tah tat taz tba tbb tbc tbe tbh tbt tbz tca tcb tcc tce tch tct te- tea teb tec tee teh tet tez th- tha thb thc the thh tht thz tta ttb ttc tte tth ttt tza tze zaa zab zac zah zat zaz zbb zbc zbt zce zea zeb zec zee zeh zet zez zha zhc zhe zta zte zzt zzz