bbb bbe bbk bbm bbo be- beb bee bek bem beo bkb bke bkk bkm bko bmb bme bmk bmm bmo bob boe bok bom boo ebb ebe ebk ebm ebo eeb eee eek eem eeo ekb eke eko em- emb eme emk emm emo eo- eob eoe eok eom eoo kbb kbe kbk kbm kbo ke- keb kee kek kem keo kkb kke kkk kkm kmb kme kmk kmm kmo kob koe kok kom koo m-o mbb mbe mbk mbm mbo meb mee mek mem meo mkb mke mkk mkm mko mmb mme mmk mmm mmo mob moe mok mom moo ob- obb obe obk obm obo oeb oee oem oeo okb oke okk oko om- omb ome omm omo oo- oob ook oom ooo