-al a-a a-b aaa aab aad aae aal ab- aba abb abd abe abl ad- ada adb add ade adl aea aeb aed aee ael al- ala alb ald ale all baa bab bad bae bal bba bbb bbd bbe bbl bda bdb bdd bde bdl be- bea beb bed bee bel bla blb bld ble bll daa dab dad dae dal dba dbb dbd dbe dbl dda ddb ddd dde ddl de- dea deb ded dee del dl- dla dlb dld dle dll eaa eab ead eae eal eba ebb ebd ebe ebl ed- eda edb edd ede edl eea eeb eed eee eel ela elb eld ele ell la- laa lab lad lae lal lba lbb lbd lbe lbl lda ldb ldd lde ldl lea leb led lee lel lla llb lld lle lll