-al a-a a-b a-c aaa aab aac aal aam aan ab- aba abb abc abl abm abn ac- aca acb acc acl acm acn al- ala alb alc all alm aln ama amb amc aml amm amn an- ana anb anc anl anm ann baa bab bac bal bam ban bba bbb bbc bbl bbm bbn bca bcb bcc bcl bcm bcn bla blb blc bll blm bln bma bmb bmc bml bmm bmn bna bnb bnc bnl bnn c-- caa cab cac cal cam can cba cbb cbc cbl cbm cbn cca ccb ccc ccl ccm ccn cl- cla clb clc cll clm cln cma cmb cmc cml cmm cmn cn- cna cnb cnc cnl cnm cnn la- laa lab lac lal lam lan lba lbb lbc lbl lbm lca lcb lcc lcl lcm lcn lla llb llc lll llm lln lma lmb lmc lml lmm lmn lna lnb lnc lnl lnm lnn maa mab mac mal mam man mba mbb mbc mbl mbm mc- mca mcb mcc mcl mcm mcn mla mlb mlc mll mlm mln mma mmb mmc mml mmm mmn mna mnb mnc mnl mnm mnn naa nab nac nal nam nan nba nbb nbc nbl nbm nbn nca ncb ncc ncl ncm ncn nla nlb nlc nll nlm nln nma nmb nmc nml nmm nmn nna nnb nnc nnl nnm nnn