b-u bbb bbi bbn bbr bbu bbw bi- bib bii bin bir biu biw bnb bni bnn bnr bnu bnw brb bri brn brr bru brw bub bui bun bur buu buw bwb bwi bwr bwu ibb ibi ibn ibr ibu ibw iib iii iin iir iiu iiw in- inb ini inn inr inu ir- irb iri irn irr iru iu- iub iui iur iwb iwi iwr iwu iww n-i nbb nbi nbn nbr nbu nbw nib nii nin nir niu nnb nni nnn nnu nnw nrb nri nrn nrr nru nrw nub nui nun nur nuu nwb nwi nwn nwr nwu rbb rbi rbn rbr rbu rbw rib rii rin rir rnb rni rnn rnr rnu rnw rrb rri rrn rrr rru rub rui run rur ruu rwb rwi rwr rwu ubb ubi ubn ubr ubu ubw uib uii uin uir uiu un- unb uni unn unr unu unw ur- urb uri urn urr uru urw uun uur uuu uwb uwn uwr uww wbb wbi wbn wbr wbw wib wii win wir wiu wn- wnn wnu wnw wr- wri wrn wrr wru wrw wub wun wur wwi wwn wwu www