b-u bbb bbg bbi bbn bbu bgb bgg bgi bgn bgu bi- bib big bii bin biu bnb bng bni bnn bnu bub bug bui bun buu gbg gbi gbn gbu ggb ggg ggi ggn ggu gib gig gii gin giu gnb gni gnn gnu gu- gub gug gui gun guu ibb ibg ibi ibn ibu igb igg igi ign igu iib iii iin iiu in- inb ing ini inn inu iu- iub iug iui n-i nbb nbg nbi nbn nbu ngb ngg ngi ngn ngu nib nig nii nin niu nnb nng nni nnn nnu nub nug nui nun nuu ubb ubg ubi ubn ubu ugb ugg ugi ugn ugu uib uig uii uin uiu un- unb ung uni unn unu uug uun uuu