-al a-a a-b a-c aaa aab aac aah aal aan ab- aba abb abc abh abl abn ac- aca acb acc ach acl acn aha ahb ahc ahh ahl ahn al- ala alb alc alh all aln an- ana anb anc anh anl ann baa bab bac bah bal ban bba bbb bbc bbh bbl bbn bca bcb bcc bch bcl bcn bha bhb bhc bhh bhl bla blb blc blh bll bln bna bnb bnc bnl bnn c-- caa cab cac cah cal can cba cbb cbc cbh cbl cbn cca ccb ccc cch ccl ccn ch- cha chb chc chh chl chn cl- cla clb clc clh cll cln cn- cna cnb cnc cnh cnl cnn haa hab hac hah hal han hba hbb hbc hbh hbl hbn hca hcb hcc hch hcl hcn hha hhb hhc hhh hhl hhn hla hlb hlc hlh hll hln hna hnb hnc hnh hnl hnn la- laa lab lac lah lal lan lba lbb lbc lbh lbl lca lcb lcc lch lcl lcn lha lhb lhc lhh lla llb llc lll lln lna lnb lnc lnh lnl lnn naa nab nac nah nal nan nba nbb nbc nbl nbn nca ncb ncc nch ncl ncn nha nhb nhc nhh nhl nhn nla nlb nlc nlh nll nln nna nnb nnc nnh nnl nnn