-al -ol a-a a-b a-t aaa aab aad aae aaf aak aal aao aat ab- aba abb abd abe abf abk abl abo abt ad- ada adb add ade adf adk adl ado adt aea aeb aed aee aef aek ael aeo aet af- afa afb afd afe aff afk afl afo aft aka akb akd ake akk akl ako al- ala alb ald ale alf alk all alo alt aoa aob aod aoe aof aok aol aoo aot at- ata atb atd ate atf atl ato att baa bab bad bae baf bak bal bao bat bba bbb bbd bbe bbf bbk bbl bbo bbt bda bdb bdd bde bdf bdk bdl bdo bdt be- bea beb bed bee bef bek bel beo bet bfa bfb bfd bfe bff bfl bfo bft bka bkb bke bkf bkk bkl bko bkt bla blb bld ble blf blk bll blo blt boa bob bod boe bof bok bol boo bot bta btb btd bte btf btk btl bto btt daa dab dad dae daf dak dal dao dat dba dbb dbd dbe dbf dbk dbl dbo dbt dda ddb ddd dde ddf ddk ddl ddo ddt de- dea deb ded dee def dek del deo det dfa dfb dfd dfe dff dfk dfl dfo dft dka dkb dke dkk dkl dko dkt dl- dla dlb dld dle dlf dlk dll dlo dlt doa dob dod doe dof dok dol doo dot dta dtb dtd dte dtf dtk dtl dto dtt eaa eab ead eae eaf eak eal eao eat eba ebb ebd ebe ebf ebk ebl ebo ebt ed- eda edb edd ede edf edk edl edo edt eea eeb eed eee eef eek eel eeo eet ef- efa efb efd efe eff efl efo eft eka ekb ekd eke ekf ekl eko ekt ela elb eld ele elf elk ell elo elt eo- eoa eob eod eoe eof eok eol eoo eot eta etb etd ete etf etk etl eto ett faa fab fad fae faf fak fal fao fat fba fbb fbd fbe fbf fbk fbl fbo fbt fda fdb fdd fde fdf fdk fdl fdo fdt fea feb fed fee fef fek fel feo fet ffa ffd ffe fff ffk ffl ffo fft fka fkb fkf fkk fkl fkt fla flb fld fle flf fll flo flt foa fob foe fof fok fol foo fot fta ftb ftd fte ftf ftk ftl fto ftt k-t ka- kaa kab kad kae kaf kak kal kao kat kba kbb kbd kbe kbf kbk kbl kbo kda kdb kde kdf kdk kdl kdo kdt ke- kea keb ked kee kef kek kel keo ket kfa kfd kff kfo kkb kke kkk kkl kkt kl- kla klb kld klf klo klt koa kob kod koe kof kok kol koo kot kta ktb kte ktf ktk ktl kto ktt la- laa lab lad lae laf lak lal lao lat lba lbb lbd lbe lbf lbk lbl lbo lbt lda ldb ldd lde ldf ldk ldl ldo ldt lea leb led lee lef lek lel leo let lfa lfb lfd lfe lff lfk lfl lfo lft lka lkb lkl lkt lla llb lld lle llf llk lll llo llt loa lob lod loe lof lok lol loo lot lta ltb ltd lte ltf ltk ltl lto ltt oaa oab oad oae oaf oak oal oao oat ob- oba obb obd obe obf obk obl obo obt oda odb odd ode odf odl odo odt oea oeb oed oee oef oel oeo oet of- ofa ofb ofd ofe off ofl ofo oft oka okb okd oke okk okl oko ola olb old ole olf olk oll olo olt oo- ooa oob ood oof ook ool ooo oot ot- ota otb otd ote otf otk otl oto ott taa tab tad tae taf tak tal tao tat tba tbb tbd tbe tbf tbk tbl tbo tbt tda tdb tdd tde tdf tdk tdl tdo tdt te- tea teb ted tee tef tek tel teo tet tfa tfb tfd tfe tff tfk tfl tfo tft tka tkb tke tkk tkl tko tkt tla tld tle tlf tlk tll tlo tlt to- toa tob tod toe tof tok tol too tot tta ttb ttd tte ttf ttk ttl tto ttt