-al a-a a-b aaa aab aae aah aal aax ab- aba abb abe abh abl abx aea aeb aee aeh ael aex aha ahb ahe ahh ahl ahx al- ala alb ale alh all alx ax- axa axe axh axl axx baa bab bae bah bal bax bba bbb bbe bbh bbl bbx be- bea beb bee beh bel bex bha bhb bhe bhh bhl bhx bla blb ble blh bll blx bxb bxl bxx eaa eab eae eah eal eax eba ebb ebe ebh ebl ebx eea eeb eee eel eex eha ehb ehe ehh ehl ela elb ele elh ell elx ex- exa exe exh exl exx haa hab hae hah hal hax hba hbb hbe hbh hbl hbx he- hea heb hee heh hel hex hha hhb hhe hhh hhl hla hlb hle hlh hll hlx hxl la- laa lab lae lah lal lax lba lbb lbe lbh lbl lbx lea leb lee leh lel lex lha lhb lhh lhx lla llb lle lll lxx xaa xal xbe xbl xbx xee xel xex xla xlb xxl xxx