-al -ol a-a a-b aaa aab aad aae aaf aal aao aau ab- aba abb abd abe abf abl abo abu ad- ada adb add ade adf adl ado adu aea aeb aed aee aef ael aeo aeu af- afa afb afd afe aff afl afo afu al- ala alb ald ale alf all alo alu aoa aob aod aoe aof aol aoo aou au- aua aub aud aue auf aul auo b-u baa bab bad bae baf bal bao bau bba bbb bbd bbe bbf bbl bbo bbu bda bdb bdd bde bdf bdl bdo bdu be- bea beb bed bee bef bel beo beu bfa bfb bfd bfe bff bfl bfo bfu bla blb bld ble blf bll blo blu boa bob bod boe bof bol boo bou bua bub bud bue buf bul buo buu daa dab dad dae daf dal dao dau dba dbb dbd dbe dbf dbl dbo dbu dda ddb ddd dde ddf ddl ddo ddu de- dea deb ded dee def del deo deu dfa dfb dfd dfe dff dfl dfo dfu dl- dla dlb dld dle dlf dll dlo dlu doa dob dod doe dof dol doo dou dua dub dud due duf dul duo eaa eab ead eae eaf eal eao eau eba ebb ebd ebe ebf ebl ebo ebu ed- eda edb edd ede edf edl edo edu eea eeb eed eee eef eel eeo ef- efa efb efd efe eff efl efo ela elb eld ele elf ell elo elu eo- eoa eob eod eoe eof eol eoo eou eu- eua eub eud eue euf eul faa fab fad fae faf fal fao fau fba fbb fbd fbe fbf fbl fbo fbu fda fdb fdd fde fdf fdl fdo fdu fea feb fed fee fef fel feo feu ffa ffd ffe fff ffl ffo ffu fla flb fld fle flf fll flo flu foa fob foe fof fol foo fou fua fub fud fue fuf ful fuo fuu la- laa lab lad lae laf lal lao lau lba lbb lbd lbe lbf lbl lbo lbu lda ldb ldd lde ldf ldl ldo ldu lea leb led lee lef lel leo leu lfa lfb lfd lfe lff lfl lfo lfu lla llb lld lle llf lll llo llu loa lob lod loe lof lol loo lou lua lub lud lue luf lul luo luu oaa oab oad oae oaf oal oao oau ob- oba obb obd obe obf obl obo obu oda odb odd ode odf odl odo odu oea oeb oed oee oef oel oeo of- ofa ofb ofd ofe off ofl ofo ofu ola olb old ole olf oll olo olu oo- ooa oob ood oof ool ooo ou- oua oud oue ouf oul ouo ua- uaa uab uad uae uaf ual uao uau uba ubb ube ubf ubl ubo ubu uda udb udd ude udf udl udo udu uea ueb ued uee uef uel ufa ufd ufe uff ufl ufo ufu ula ulb uld ule ulf ull ulo ulu uoa uob uod uoe uol uoo uua uue uuu