b-u bbb bbi bbn bbo bbr bbu bby bi- bib bii bin bio bir biu biy bnb bni bnn bno bnr bnu bob boi bon boo bor bou boy brb bri brn bro brr bru bry bub bui bun buo bur buu buy by- byi byn byo byr byu ibb ibi ibn ibo ibr ibu iby iib iii iin iio iir iiu in- inb ini inn ino inr inu iny io- iob ioi ion ioo ior iou ir- irb iri irn iro irr iru iry iu- iub iui iur iyo iyr iyy n-i nbb nbi nbn nbo nbr nbu nib nii nin nio nir niu nnb nni nnn nno nnu no- nob noi non noo nor nou noy nrb nri nrn nro nrr nru nry nub nui nun nuo nur nuu nuy nyn nyo nyu nyy o-i ob- obb obi obn obo obr obu oby oib oii oin oio oir oiu on- onb oni onn ono onr onu ony oo- oob ooi oon ooo oor or- orb ori orn oro orr oru ory ou- oui oun ouo our oyi oyo rbb rbi rbn rbo rbr rbu rib rii rin rio rir riy rnb rni rnn rno rnr rnu rny rob roi ron roo ror rou roy rrb rri rrn rrr rru rub rui run ruo rur ruu ruy ry- ryn ryo ryr ryu ryy ubb ubi ubn ubo ubr ubu uby uib uii uin uio uir uiu un- unb uni unn uno unr unu uny uob uon uoo uor ur- urb uri urn uro urr uru ury uun uur uuu uyi uyo uyu ybi ybr yby yii yin yio yir ynn ynu yny yob yoi yon yoo yor you yoy yrn yro yru yui yun yuo yur yuu yuy yyb yyu yyy