a-a a-b a-z aaa aab aae aah aak aaz ab- aba abb abe abh abk abz aea aeb aee aeh aek aez aha ahb ahe ahh ahk ahz aka akb ake akh akk az- aza azb aze azz baa bab bae bah bak baz bba bbb bbe bbh bbk be- bea beb bee beh bek bez bha bhb bhe bhh bhk bka bkb bke bkk bza bze bzh bzz eaa eab eae eah eak eaz eba ebb ebe ebh ebk eea eeb eee eek eha ehb ehe ehh eka ekb eke ekh eze ezh ezz haa hab hae hah hak haz hba hbb hbe hbh hbk hbz he- hea heb hee heh hek hez hha hhb hhe hhh hhk hhz hka hkb hkh hkk hze k-z ka- kaa kab kae kah kak kaz kba kbb kbe kbh kbk kbz ke- kea keb kee keh kek kez kha khe khh khk khz kkb kke kkh kkk zaa zab zah zak zaz zbb zea zeb zee zeh zek zez zha zhe zka zzz