-al a-a a-b a-t aaa aab aad aae aal aat ab- aba abb abd abe abl abt ad- ada adb add ade adl adt aea aeb aed aee ael aet al- ala alb ald ale all alt at- ata atb atd ate atl att baa bab bad bae bal bat bba bbb bbd bbe bbl bbt bda bdb bdd bde bdl bdt be- bea beb bed bee bel bet bla blb bld ble bll blt bta btb btd bte btl btt daa dab dad dae dal dat dba dbb dbd dbe dbl dbt dda ddb ddd dde ddl ddt de- dea deb ded dee del det dl- dla dlb dld dle dll dlt dta dtb dtd dte dtl dtt eaa eab ead eae eal eat eba ebb ebd ebe ebl ebt ed- eda edb edd ede edl edt eea eeb eed eee eel eet ela elb eld ele ell elt eta etb etd ete etl ett la- laa lab lad lae lal lat lba lbb lbd lbe lbl lbt lda ldb ldd lde ldl ldt lea leb led lee lel let lla llb lld lle lll llt lta ltb ltd lte ltl ltt taa tab tad tae tal tat tba tbb tbd tbe tbl tbt tda tdb tdd tde tdl tdt te- tea teb ted tee tel tet tla tld tle tll tlt tta ttb ttd tte ttl ttt