b-u bbb bbi bbn bbq bbr bbu bi- bib bii bin bir biu bnb bni bnn bnr bnu brb bri brn brq brr bru bub bui bun bur buu ibb ibi ibn ibr ibu iib iii iin iir iiu in- inb ini inn inq inr inu iqu ir- irb iri irn irq irr iru iu- iub iui iur n-i nbb nbi nbn nbr nbu nib nii nin niq nir niu nnb nni nnn nnu nrb nri nrn nrr nru nub nui nun nuq nur nuu qbq qin qir qiu qnb qni qqq qqu qrb qri qru qu- qui qur rbb rbi rbn rbr rbu rib rii rin riq rir rnb rni rnn rnr rnu rqn rrb rri rrn rrq rrr rru rub rui run rur ruu ubb ubi ubn ubr ubu uib uii uin uiq uir uiu un- unb uni unn unq unr unu ur- urb uri urn urr uru uun uur uuu