b-u bbb bbg bbi bbn bbr bbu bgb bgg bgi bgn bgr bgu bi- bib big bii bin bir biu bnb bng bni bnn bnr bnu brb brg bri brn brr bru bub bug bui bun bur buu gbg gbi gbn gbr gbu ggb ggg ggi ggn ggr ggu gib gig gii gin gir giu gnb gni gnn gnr gnu grb grg gri grn grr gru gu- gub gug gui gun gur guu ibb ibg ibi ibn ibr ibu igb igg igi ign igr igu iib iii iin iir iiu in- inb ing ini inn inr inu ir- irb irg iri irn irr iru iu- iub iug iui iur n-i nbb nbg nbi nbn nbr nbu ngb ngg ngi ngn ngu nib nig nii nin nir niu nnb nng nni nnn nnu nrb nrg nri nrn nrr nru nub nug nui nun nur nuu rbb rbg rbi rbn rbr rbu rgb rgg rgi rgn rgr rib rig rii rin rir rnb rng rni rnn rnr rnu rrb rrg rri rrn rrr rru rub rug rui run rur ruu ubb ubg ubi ubn ubr ubu ugb ugg ugi ugn ugr ugu uib uig uii uin uir uiu un- unb ung uni unn unr unu ur- urb urg uri urn urr uru uug uun uur uuu