-up b-p b-u bbb bbo bbp bbr bbt bbu bby bob boo bop bor bot bou boy bpb bpo bpp bpr bpt bpu bpy brb bro brp brr brt bru bry btb bto btp btr btt btu bty bub buo bup bur but buu buy by- byo byp byr byt byu ob- obb obo obp obr obt obu oby oo- oob ooo oop oor oot op- opb opo opp opr opt opy or- orb oro orp orr ort oru ory ot- otb oto otp otr ott otu ou- ouo oup our out oyo p-p pbb pbo pbp pbr pbt pbu pby pob poo pop por pot pou poy ppb ppo ppp ppr ppt ppu prb pro prp prr prt pru pry pt- ptb pto ptp ptr ptt ptu pty pub pup pur put puu puy py- pyb pyo pyr pyt pyu rbb rbo rbp rbr rbt rbu rob roo rop ror rot rou roy rpb rpo rpp rpr rpt rpu rrb rrp rrr rrt rru rtb rto rtp rtr rtt rtu rty rub ruo rup rur rut ruu ruy ry- ryo ryr ryu ryy tbb tbo tbp tbr tbt tbu to- tob too top tor tot tou toy tpb tpo tpp tpr tpt tpu trb tro trp trr trt tru try ttb tto ttp ttr ttt ttu tty tub tuo tup tur tut tuu tuy tyo typ tyr tyt ubb ubo ubp ubr ubt ubu uby uob uoo uop uor uot up- upb upo upp upr upt upu ur- urb uro urp urr urt uru ury utb uto utp utr utt utu uty uur uut uuu uyo uyu ybp ybr yby yob yoo yop yor yot you yoy ypo ypu yro yrp yrt yru yto ytp ytr ytt ytu yuo yup yur yut yuu yuy yyb yyt yyu yyy