-al a-a a-c aaa aac aae aah aal aax ac- aca acc ace ach acl acx aea aec aee aeh ael aex aha ahc ahe ahh ahl ahx al- ala alc ale alh all alx ax- axa axe axh axl axx c-- caa cac cae cah cal cax cca ccc cce cch ccl ccx ce- cea cec cee ceh cel cex ch- cha chc che chh chl chx cl- cla clc cle clh cll clx cxc cxh cxl cxx eaa eac eae eah eal eax ec- eca ecc ece ech ecl ecx eea eec eee eel eex eha ehc ehe ehh ehl ela elc ele elh ell elx ex- exa exc exe exh exl exx haa hac hae hah hal hax hca hcc hce hch hcl he- hea hec hee heh hel hex hha hhc hhe hhh hhl hla hlc hle hlh hll hlx hxc hxl la- laa lac lae lah lal lax lca lcc lce lch lcl lcx lea lec lee leh lel lex lha lhc lhh lhx lla llc lle lll lxc lxx xaa xac xal xch xcl xcx xee xel xex xla xxl xxx