-ol b-u bbb bbe bbl bbo bbu be- beb bee bel beo beu bez blb ble bll blo blu blz bob boe bol boo bou boz bub bue bul buo buu buz bze bzo bzu bzz ebb ebe ebl ebo ebu eeb eee eel eeo elb ele ell elo elu elz eo- eob eoe eol eoo eou eu- eub eue eul eze ezo ezz lbb lbe lbl lbo lbu leb lee lel leo leu lez llb lle lll llo llu llz lob loe lol loo lou loz lub lue lul luo luu luz lzo lzu ob- obb obe obl obo obu oeb oee oel oeo olb ole oll olo olu oo- oob ool ooo ou- oue oul ouo oze ozo ozu ozz ubb ube ubl ubo ubu ueb uee uel ulb ule ull ulo ulu uob uoe uol uoo uue uuu uzb uzo uzu zbb zbl zeb zee zel zeo zez zo- zob zoe zol zoo zou zub zul zuz zzz