-al a-a a-b a-c aaa aab aac aak aal aam ab- aba abb abc abk abl abm ac- aca acb acc ack acl acm aka akb akc akk akl akm al- ala alb alc alk all alm ama amb amc amk aml amm baa bab bac bak bal bam bba bbb bbc bbk bbl bbm bca bcb bcc bck bcl bcm bka bkb bkc bkk bkl bkm bla blb blc blk bll blm bma bmb bmc bmk bml bmm c-- caa cab cac cak cal cam cba cbb cbc cbk cbl cbm cca ccb ccc cck ccl ccm cka ckb ckc ckm cl- cla clb clc clk cll clm cma cmb cmc cmk cml cmm ka- kaa kab kac kak kal kam kba kbb kbc kbk kbl kbm kca kcb kcc kck kcl kcm kkb kkc kkk kkl kkm kl- kla klb klc klm kma kmb kmc kmk kml kmm la- laa lab lac lak lal lam lba lbb lbc lbk lbl lbm lca lcb lcc lck lcl lcm lka lkb lkl lla llb llc llk lll llm lma lmb lmc lmk lml lmm maa mab mac mak mal mam mba mbb mbc mbk mbl mbm mc- mca mcb mcc mck mcl mcm mka mkb mkc mkk mkl mkm mla mlb mlc mlk mll mlm mma mmb mmc mmk mml mmm