a-a a-b a-z aaa aab aae aak aam aaz ab- aba abb abe abk abm abz aea aeb aee aek aem aez aka akb ake akk akm ama amb ame amk amm amz az- aza azb aze azm azz baa bab bae bak bam baz bba bbb bbe bbk bbm be- bea beb bee bek bem bez bka bkb bke bkk bkm bma bmb bme bmk bmm bmz bza bze bzz eaa eab eae eak eam eaz eba ebb ebe ebk ebm eea eeb eee eek eem eka ekb eke em- ema emb eme emk emm eze ezz k-z ka- kaa kab kae kak kam kaz kba kbb kbe kbk kbm kbz ke- kea keb kee kek kem kez kkb kke kkk kkm kma kmb kme kmk kmm kmz maa mab mae mak mam maz mba mbb mbe mbk mbm mea meb mee mek mem mez mka mkb mke mkk mkm mkz mma mmb mme mmk mmm mmz mza mzb mzm zaa zab zak zam zaz zbb zbm zea zeb zee zek zem zez zka zma zmb zmk zmm zzz