b-p bbb bbd bbo bbp bbr bby bdb bdd bdo bdp bdr bdy bob bod boo bop bor boy bpb bpd bpo bpp bpr bpy brb brd bro brp brr bry by- byd byo byp byr dbb dbd dbo dbp dbr dby ddb ddd ddo ddp ddr ddy dob dod doo dop dor doy dpb dpd dpo dpp dpr drb drd dro drp drr dry dy- dyb dyd dyo dyp dyr dyy ob- obb obd obo obp obr oby odb odd odo odp odr oo- oob ood ooo oop oor op- opb opd opo opp opr opy or- orb ord oro orp orr ory oyd oyo p-p pbb pbd pbo pbp pbr pby pdb pdd pdo pdp pdr pob pod poo pop por poy ppb ppd ppo ppp ppr prb prd pro prp prr pry py- pyb pyd pyo pyr rbb rbd rbo rbp rbr rdb rdd rdo rdp rdr rdy rob rod roo rop ror roy rpb rpd rpo rpp rpr rrb rrd rrp rrr ry- ryd ryo ryr ryy ybp ybr yby ydo ydy yob yod yoo yop yor yoy ypd ypo yro yrp yyb yyy