-al -ol a-a a-b a-t aaa aab aad aae aal aao aat ab- aba abb abd abe abl abo abt ad- ada adb add ade adl ado adt aea aeb aed aee ael aeo aet al- ala alb ald ale all alo alt aoa aob aod aoe aol aoo aot at- ata atb atd ate atl ato att baa bab bad bae bal bao bat bba bbb bbd bbe bbl bbo bbt bda bdb bdd bde bdl bdo bdt be- bea beb bed bee bel beo bet bla blb bld ble bll blo blt boa bob bod boe bol boo bot bta btb btd bte btl bto btt daa dab dad dae dal dao dat dba dbb dbd dbe dbl dbo dbt dda ddb ddd dde ddl ddo ddt de- dea deb ded dee del deo det dl- dla dlb dld dle dll dlo dlt doa dob dod doe dol doo dot dta dtb dtd dte dtl dto dtt eaa eab ead eae eal eao eat eba ebb ebd ebe ebl ebo ebt ed- eda edb edd ede edl edo edt eea eeb eed eee eel eeo eet ela elb eld ele ell elo elt eo- eoa eob eod eoe eol eoo eot eta etb etd ete etl eto ett la- laa lab lad lae lal lao lat lba lbb lbd lbe lbl lbo lbt lda ldb ldd lde ldl ldo ldt lea leb led lee lel leo let lla llb lld lle lll llo llt loa lob lod loe lol loo lot lta ltb ltd lte ltl lto ltt oaa oab oad oae oal oao oat ob- oba obb obd obe obl obo obt oda odb odd ode odl odo odt oea oeb oed oee oel oeo oet ola olb old ole oll olo olt oo- ooa oob ood ool ooo oot ot- ota otb otd ote otl oto ott taa tab tad tae tal tao tat tba tbb tbd tbe tbl tbo tbt tda tdb tdd tde tdl tdo tdt te- tea teb ted tee tel teo tet tla tld tle tll tlo tlt to- toa tob tod toe tol too tot tta ttb ttd tte ttl tto ttt