b-u bbb bbg bbi bbo bbu bgb bgg bgi bgo bgu bi- bib big bii bio biu bob bog boi boo bou bub bug bui buo buu gbg gbi gbo gbu ggb ggg ggi ggo ggu gib gig gii gio giu gob gog goi goo gou gu- gub gug gui guo guu ibb ibg ibi ibo ibu igb igg igi igo igu iib iii iio iiu io- iob iog ioi ioo iou iu- iub iug iui o-i ob- obb obg obi obo obu ogg ogi ogo oib oii oio oiu oo- oob oog ooi ooo ou- oui ouo ubb ubg ubi ubo ubu ugb ugg ugi ugo ugu uib uig uii uio uiu uob uog uoo uug uuu