-al -ol a-a a-b aaa aab aae aaf aal aao aau ab- aba abb abe abf abl abo abu aea aeb aee aef ael aeo aeu af- afa afb afe aff afl afo afu al- ala alb ale alf all alo alu aoa aob aoe aof aol aoo aou au- aua aub aue auf aul auo b-u baa bab bae baf bal bao bau bba bbb bbe bbf bbl bbo bbu be- bea beb bee bef bel beo beu bfa bfb bfe bff bfl bfo bfu bla blb ble blf bll blo blu boa bob boe bof bol boo bou bua bub bue buf bul buo buu eaa eab eae eaf eal eao eau eba ebb ebe ebf ebl ebo ebu eea eeb eee eef eel eeo ef- efa efb efe eff efl efo ela elb ele elf ell elo elu eo- eoa eob eoe eof eol eoo eou eu- eua eub eue euf eul faa fab fae faf fal fao fau fba fbb fbe fbf fbl fbo fbu fea feb fee fef fel feo feu ffa ffe fff ffl ffo ffu fla flb fle flf fll flo flu foa fob foe fof fol foo fou fua fub fue fuf ful fuo fuu la- laa lab lae laf lal lao lau lba lbb lbe lbf lbl lbo lbu lea leb lee lef lel leo leu lfa lfb lfe lff lfl lfo lfu lla llb lle llf lll llo llu loa lob loe lof lol loo lou lua lub lue luf lul luo luu oaa oab oae oaf oal oao oau ob- oba obb obe obf obl obo obu oea oeb oee oef oel oeo of- ofa ofb ofe off ofl ofo ofu ola olb ole olf oll olo olu oo- ooa oob oof ool ooo ou- oua oue ouf oul ouo ua- uaa uab uae uaf ual uao uau uba ubb ube ubf ubl ubo ubu uea ueb uee uef uel ufa ufe uff ufl ufo ufu ula ulb ule ulf ull ulo ulu uoa uob uoe uol uoo uua uue uuu