b-p bbb bbh bbo bbp bbr bby bhb bhh bho bhp bhr bob boh boo bop bor boy bpb bph bpo bpp bpr bpy brb brh bro brp brr bry by- byh byo byp byr hbb hbh hbo hbp hbr hby hhb hhh hho hhp hhr hhy hob hoh hoo hop hor hoy hpb hph hpo hpp hpr hpy hr- hrb hrh hro hrp hrr hy- hyb hyh hyo hyp hyr hyy ob- obb obh obo obp obr oby ohh oho ohp ohr oo- oob ooh ooo oop oor op- opb oph opo opp opr opy or- orb orh oro orp orr ory oyo p-p pbb pbo pbp pbr pby phb pho php phr phy pob poh poo pop por poy ppb pph ppo ppp ppr prb prh pro prp prr pry py- pyb pyo pyr rbb rbh rbo rbp rbr rh- rhb rhh rho rhp rhr rob roh roo rop ror roy rpb rph rpo rpp rpr rrb rrh rrp rrr ry- ryo ryr ryy ybp ybr yby yob yoo yop yor yoy ypo yro yrp yyb yyy