b-p bbb bbo bbp bbr bbt bby bob boo bop bor bot boy bpb bpo bpp bpr bpt bpy brb bro brp brr brt bry btb bto btp btr btt bty by- byo byp byr byt ob- obb obo obp obr obt oby oo- oob ooo oop oor oot op- opb opo opp opr opt opy or- orb oro orp orr ort ory ot- otb oto otp otr ott oyo p-p pbb pbo pbp pbr pbt pby pob poo pop por pot poy ppb ppo ppp ppr ppt prb pro prp prr prt pry pt- ptb pto ptp ptr ptt pty py- pyb pyo pyr pyt rbb rbo rbp rbr rbt rob roo rop ror rot roy rpb rpo rpp rpr rpt rrb rrp rrr rrt rtb rto rtp rtr rtt rty ry- ryo ryr ryy tbb tbo tbp tbr tbt to- tob too top tor tot toy tpb tpo tpp tpr tpt trb tro trp trr trt try ttb tto ttp ttr ttt tty tyo typ tyr tyt ybp ybr yby yob yoo yop yor yot yoy ypo yro yrp yrt yto ytp ytr ytt yyb yyt yyy