b-u bbb bbh bbm bbo bbu bhb bhh bhm bho bhu bmb bmh bmm bmo bmu bob boh bom boo bou bub buh bum buo buu hbb hbh hbm hbo hbu hhb hhh hhm hho hhu hmb hmh hmm hmo hmu hob hoh hom hoo hou hub huh hum huo huu m-o mbb mbh mbm mbo mbu mhh mhm mho mhu mmb mmh mmm mmo mmu mob moh mom moo mou mub muh mum muu ob- obb obh obm obo obu ohh ohm oho ohu om- omb omh omm omo omu oo- oob ooh oom ooo ou- ouh oum ouo ubb ubh ubo ubu uhb uhh uhm uho uhu um- umb umh umm umo umu uob uom uoo uum uuu