-al a-a a-b a-t aaa aab aad aae aaf aal aat ab- aba abb abd abe abf abl abt ad- ada adb add ade adf adl adt aea aeb aed aee aef ael aet af- afa afb afd afe aff afl aft al- ala alb ald ale alf all alt at- ata atb atd ate atf atl att baa bab bad bae baf bal bat bba bbb bbd bbe bbf bbl bbt bda bdb bdd bde bdf bdl bdt be- bea beb bed bee bef bel bet bfa bfb bfd bfe bff bfl bft bla blb bld ble blf bll blt bta btb btd bte btf btl btt daa dab dad dae daf dal dat dba dbb dbd dbe dbf dbl dbt dda ddb ddd dde ddf ddl ddt de- dea deb ded dee def del det dfa dfb dfd dfe dff dfl dft dl- dla dlb dld dle dlf dll dlt dta dtb dtd dte dtf dtl dtt eaa eab ead eae eaf eal eat eba ebb ebd ebe ebf ebl ebt ed- eda edb edd ede edf edl edt eea eeb eed eee eef eel eet ef- efa efb efd efe eff efl eft ela elb eld ele elf ell elt eta etb etd ete etf etl ett faa fab fad fae faf fal fat fba fbb fbd fbe fbf fbl fbt fda fdb fdd fde fdf fdl fdt fea feb fed fee fef fel fet ffa ffd ffe fff ffl fft fla flb fld fle flf fll flt fta ftb ftd fte ftf ftl ftt la- laa lab lad lae laf lal lat lba lbb lbd lbe lbf lbl lbt lda ldb ldd lde ldf ldl ldt lea leb led lee lef lel let lfa lfb lfd lfe lff lfl lft lla llb lld lle llf lll llt lta ltb ltd lte ltf ltl ltt taa tab tad tae taf tal tat tba tbb tbd tbe tbf tbl tbt tda tdb tdd tde tdf tdl tdt te- tea teb ted tee tef tel tet tfa tfb tfd tfe tff tfl tft tla tld tle tlf tll tlt tta ttb ttd tte ttf ttl ttt