-al a-a a-b a-c aaa aab aac aah aak aal ab- aba abb abc abh abk abl ac- aca acb acc ach ack acl aha ahb ahc ahh ahk ahl aka akb akc akh akk akl al- ala alb alc alh alk all baa bab bac bah bak bal bba bbb bbc bbh bbk bbl bca bcb bcc bch bck bcl bha bhb bhc bhh bhk bhl bka bkb bkc bkk bkl bla blb blc blh blk bll c-- caa cab cac cah cak cal cba cbb cbc cbh cbk cbl cca ccb ccc cch cck ccl ch- cha chb chc chh chk chl cka ckb ckc ckh cl- cla clb clc clh clk cll haa hab hac hah hak hal hba hbb hbc hbh hbk hbl hca hcb hcc hch hck hcl hha hhb hhc hhh hhk hhl hka hkb hkh hkk hkl hla hlb hlc hlh hll ka- kaa kab kac kah kak kal kba kbb kbc kbh kbk kbl kca kcb kcc kch kck kcl kha khh khk kkb kkc kkh kkk kkl kl- kla klb klc klh la- laa lab lac lah lak lal lba lbb lbc lbh lbk lbl lca lcb lcc lch lck lcl lha lhb lhc lhh lhk lka lkb lkh lkl lla llb llc llk lll