b-u bbb bbd bbh bbo bbu bdb bdd bdh bdo bdu bhb bhd bhh bho bhu bob bod boh boo bou bub bud buh buo buu dbb dbd dbh dbo dbu ddb ddd ddh ddo ddu dh- dhb dhd dhh dho dhu dob dod doh doo dou dub dud duh duo hbb hbd hbh hbo hbu hdb hdd hdh hdo hdu hhb hhd hhh hho hhu hob hod hoh hoo hou hub hud huh huo huu ob- obb obd obh obo obu odb odd odh odo odu ohd ohh oho ohu oo- oob ood ooh ooo ou- oud ouh ouo ubb ubh ubo ubu udb udd udo udu uhb uhd uhh uho uhu uob uod uoo uuu