b-u bbb bbd bbh bbo bbr bbu bdb bdd bdh bdo bdr bdu bhb bhd bhh bho bhr bhu bob bod boh boo bor bou brb brd brh bro brr bru bub bud buh buo bur buu dbb dbd dbh dbo dbr dbu ddb ddd ddh ddo ddr ddu dh- dhb dhd dhh dho dhr dhu dob dod doh doo dor dou drb drd dro drr dru dub dud duh duo dur hbb hbd hbh hbo hbr hbu hdb hdd hdh hdo hdr hdu hhb hhd hhh hho hhr hhu hob hod hoh hoo hor hou hr- hrb hrd hrh hro hrr hru hub hud huh huo hur huu ob- obb obd obh obo obr obu odb odd odh odo odr odu ohd ohh oho ohr ohu oo- oob ood ooh ooo oor or- orb ord orh oro orr oru ou- oud ouh ouo our rbb rbd rbh rbo rbr rbu rdb rdd rdh rdo rdr rdu rh- rhb rhd rhh rho rhr rhu rob rod roh roo ror rou rrb rrd rrh rrr rru rub rud ruh ruo rur ruu ubb ubh ubo ubr ubu udb udd udo udr udu uhb uhd uhh uho uhr uhu uob uod uoo uor ur- urb urd uro urr uru uur uuu