-ol b-u bbb bbd bbe bbk bbl bbo bbu bdb bdd bde bdk bdl bdo bdu be- beb bed bee bek bel beo beu bkb bke bkk bkl bko blb bld ble blk bll blo blu bob bod boe bok bol boo bou bub bud bue buk bul buo buu dbb dbd dbe dbk dbl dbo dbu ddb ddd dde ddk ddl ddo ddu de- deb ded dee dek del deo deu dkb dke dkk dkl dko dku dl- dlb dld dle dlk dll dlo dlu dob dod doe dok dol doo dou dub dud due duk dul duo ebb ebd ebe ebk ebl ebo ebu ed- edb edd ede edk edl edo edu eeb eed eee eek eel eeo ekb ekd eke ekl eko eku elb eld ele elk ell elo elu eo- eob eod eoe eok eol eoo eou eu- eub eud eue eul kbb kbd kbe kbk kbl kbo kbu kdb kde kdk kdl kdo kdu ke- keb ked kee kek kel keo kkb kke kkk kkl kku kl- klb kld klo klu kob kod koe kok kol koo kou kub kud kue kuk kul kuu lbb lbd lbe lbk lbl lbo lbu ldb ldd lde ldk ldl ldo ldu leb led lee lek lel leo leu lkb lkl llb lld lle llk lll llo llu lob lod loe lok lol loo lou lub lud lue luk lul luo luu ob- obb obd obe obk obl obo obu odb odd ode odl odo odu oeb oed oee oel oeo okb okd oke okk okl oko oku olb old ole olk oll olo olu oo- oob ood ook ool ooo ou- oud oue ouk oul ouo ubb ube ubk ubl ubo ubu udb udd ude udk udl udo udu ueb ued uee uel ukb uke ukk ukl uku ulb uld ule ulk ull ulo ulu uob uod uoe uok uol uoo uue uuu