b-u bbb bbn bbo bbr bbt bbu bby bnb bnn bno bnr bnt bnu bob bon boo bor bot bou boy brb brn bro brr brt bru bry btb btn bto btr btt btu bty bub bun buo bur but buu buy by- byn byo byr byt byu nbb nbn nbo nbr nbt nbu nnb nnn nno nnt nnu no- nob non noo nor not nou noy nrb nrn nro nrr nrt nru nry ntb ntn nto ntr ntt ntu nub nun nuo nur nut nuu nuy nyn nyo nyt nyu nyy ob- obb obn obo obr obt obu oby on- onb onn ono onr ont onu ony oo- oob oon ooo oor oot or- orb orn oro orr ort oru ory ot- otb otn oto otr ott otu ou- oun ouo our out oyo rbb rbn rbo rbr rbt rbu rnb rnn rno rnr rnt rnu rny rob ron roo ror rot rou roy rrb rrn rrr rrt rru rtb rtn rto rtr rtt rtu rty rub run ruo rur rut ruu ruy ry- ryn ryo ryr ryu ryy tbb tbn tbo tbr tbt tbu tnb tnn tno tnr tnt to- tob ton too tor tot tou toy trb trn tro trr trt tru try ttb ttn tto ttr ttt ttu tty tub tun tuo tur tut tuu tuy tyn tyo tyr tyt ubb ubn ubo ubr ubt ubu uby un- unb unn uno unr unt unu uny uob uon uoo uor uot ur- urb urn uro urr urt uru ury utb utn uto utr utt utu uty uun uur uut uuu uyo uyu ybr yby ynn ynu yny yob yon yoo yor yot you yoy yrn yro yrt yru ytn yto ytr ytt ytu yun yuo yur yut yuu yuy yyb yyt yyu yyy