b-p bbb bbn bbo bbp bbr bby bnb bnn bno bnp bnr bob bon boo bop bor boy bpb bpn bpo bpp bpr bpy brb brn bro brp brr bry by- byn byo byp byr nbb nbn nbo nbp nbr nnb nnn nno nnp no- nob non noo nop nor noy npb npn npo npp npr nrb nrn nro nrp nrr nry nyn nyo nyp nyy ob- obb obn obo obp obr oby on- onb onn ono onp onr ony oo- oob oon ooo oop oor op- opb opn opo opp opr opy or- orb orn oro orp orr ory oyo p-p pbb pbn pbo pbp pbr pby pn- pnb pnn pno pnp pnr pny pob pon poo pop por poy ppb ppn ppo ppp ppr prb prn pro prp prr pry py- pyb pyn pyo pyr rbb rbn rbo rbp rbr rnb rnn rno rnp rnr rny rob ron roo rop ror roy rpb rpn rpo rpp rpr rrb rrn rrp rrr ry- ryn ryo ryr ryy ybp ybr yby ynn ynp yny yob yon yoo yop yor yoy ypo yrn yro yrp yyb yyy