-ol b-u bbb bbd bbe bbl bbo bbu bdb bdd bde bdl bdo bdu be- beb bed bee bel beo beu blb bld ble bll blo blu bob bod boe bol boo bou bub bud bue bul buo buu dbb dbd dbe dbl dbo dbu ddb ddd dde ddl ddo ddu de- deb ded dee del deo deu dl- dlb dld dle dll dlo dlu dob dod doe dol doo dou dub dud due dul duo ebb ebd ebe ebl ebo ebu ed- edb edd ede edl edo edu eeb eed eee eel eeo elb eld ele ell elo elu eo- eob eod eoe eol eoo eou eu- eub eud eue eul lbb lbd lbe lbl lbo lbu ldb ldd lde ldl ldo ldu leb led lee lel leo leu llb lld lle lll llo llu lob lod loe lol loo lou lub lud lue lul luo luu ob- obb obd obe obl obo obu odb odd ode odl odo odu oeb oed oee oel oeo olb old ole oll olo olu oo- oob ood ool ooo ou- oud oue oul ouo ubb ube ubl ubo ubu udb udd ude udl udo udu ueb ued uee uel ulb uld ule ull ulo ulu uob uod uoe uol uoo uue uuu