b-u bbb bbd bbh bbo bbu bby bdb bdd bdh bdo bdu bdy bhb bhd bhh bho bhu bob bod boh boo bou boy bub bud buh buo buu buy by- byd byh byo byu dbb dbd dbh dbo dbu dby ddb ddd ddh ddo ddu ddy dh- dhb dhd dhh dho dhu dob dod doh doo dou doy dub dud duh duo duy dy- dyb dyd dyo dyu dyy hbb hbd hbh hbo hbu hby hdb hdd hdh hdo hdu hdy hhb hhd hhh hho hhu hhy hob hod hoh hoo hou hoy hub hud huh huo huu huy hy- hyb hyd hyh hyo hyy ob- obb obd obh obo obu oby odb odd odh odo odu ohd ohh oho ohu oo- oob ood ooh ooo ou- oud ouh ouo oyd oyo ubb ubh ubo ubu uby udb udd udo udu uhb uhd uhh uho uhu uhy uob uod uoo uuu uyo uyu yby ydo ydy yhu yob yod yoo you yoy yud yuh yuo yuu yuy yyb yyu yyy