bbb bbh bbk bbm bbo bhb bhh bhk bhm bho bkb bkk bkm bko bmb bmh bmk bmm bmo bob boh bok bom boo hbb hbh hbk hbm hbo hhb hhh hhk hhm hho hkb hkh hkk hkm hko hmb hmh hmk hmm hmo hob hoh hok hom hoo kbb kbh kbk kbm kbo khh khk khm kho kkb kkh kkk kkm kmb kmh kmk kmm kmo kob koh kok kom koo m-o mbb mbh mbk mbm mbo mhh mhk mhm mho mkb mkh mkk mkm mko mmb mmh mmk mmm mmo mob moh mok mom moo ob- obb obh obk obm obo ohh ohm oho okb okk oko om- omb omh omm omo oo- oob ooh ook oom ooo