b-p bbb bbo bbp bbr bbx bob boo bop bor box bpb bpo bpp bpr bpx brb bro brp brr brx bxb bxo bxx ob- obb obo obp obr obx oo- oob ooo oop oor oox op- opb opo opp opr opx or- orb oro orp orr orx ox- oxb oxo oxx p-p pbb pbo pbp pbr pbx pob poo pop por pox ppb ppo ppp ppr ppx prb pro prp prr prx pxr rbb rbo rbp rbr rbx rob roo rop ror rox rpb rpo rpp rpr rpx rrb rrp rrr rxp rxr xbr xbx xoo xop xor xox xpb xpo xpp xrx xxo xxp xxx

bbbb bbox bbpr bobb bobo boob boop boor boox bopp bor- boro borr brob broo bror brox brrr obbo obor obox obro oooo opo- opor oppo orbb orbo oro- oror orro oxo- oxox oxxo pobo poop poor pop- popo popp porb poro porr pppo pppp pro- prob proo prop prox rbbb rbbr rob- robb robo roob roop roor roox ropo roro roxo rpob rrrr xbox xoro xorp xoxo xxxo xxxx

bo-bo bobr borbo boro- boroo borox borro brobo brrrr o-r-b oboro ooooo opobo orobo p-box p-o-x po-po pobox poopo popop poppo poro- porro pppox probo proor prop- propp propr ro-ro robbo robo- robop robor rprop x-box xbxrx xorro xoxox

bbbbbb booboo borbor bororo oooooo poopoo popopo poporo poppop pppppp xoxoxo

bbbbbbb boo-boo obox-ob oroboro oxoboxo poo-poo robopop roxboro xxxxxxx

bbbbbbbb bo-bo-bo poor-box poorpoor poroporo xoxoxoxo

borborbor

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