-ol bbb bbe bbi bbk bbl bbo be- beb bee bei bek bel beo bi- bib bie bii bik bil bio bkb bke bkk bkl bko blb ble bli blk bll blo bob boe boi bok bol boo ebb ebe ebi ebk ebl ebo eeb eee eek eel eeo eib eie eii eik eil eio ekb eke eki ekl eko elb ele eli elk ell elo eo- eob eoe eoi eok eol eoo ibb ibe ibi ibk ibl ibo ie- iee iei iek iel iib iie iii iil iio ikb ike iki ikk ikl iko il- ilb ile ili ilk ill ilo io- iob ioe ioi iol ioo kbb kbe kbi kbk kbl kbo ke- keb kee kei kek kel keo kib kie kii kik kil kio kkb kke kki kkk kkl kl- klb kli klo kob koe koi kok kol koo lbb lbe lbi lbk lbl lbo leb lee lei lek lel leo lib lie lii lik lil lio lkb lkl llb lle lli llk lll llo lob loe loi lok lol loo o-i ob- obb obe obi obk obl obo oeb oee oei oel oeo oib oie oii oik oil oio okb oke oki okk okl oko olb ole oli olk oll olo oo- oob ooi ook ool ooo