-al a-a a-b a-c a-z aaa aab aac aak aal aaz ab- aba abb abc abk abl abz ac- aca acb acc ack acl acz aka akb akc akk akl al- ala alb alc alk all alz az- aza azb azz baa bab bac bak bal baz bba bbb bbc bbk bbl bca bcb bcc bck bcl bcz bka bkb bkc bkk bkl bla blb blc blk bll blz bza bzz c-- caa cab cac cak cal caz cba cbb cbc cbk cbl cbz cca ccb ccc cck ccl ccz cka ckb ckc cl- cla clb clc clk cll clz cz- czc czk k-z ka- kaa kab kac kak kal kaz kba kbb kbc kbk kbl kbz kca kcb kcc kck kcl kkb kkc kkk kkl kl- kla klb klc klz la- laa lab lac lak lal laz lba lbb lbc lbk lbl lca lcb lcc lck lcl lka lkb lkl lla llb llc llk lll llz zaa zab zac zak zaz zbb zbc zbl zcl zka zla zzz