bbb bbg bbi bbn bbo bgb bgg bgi bgn bgo bgz bi- bib big bii bin bio biz bnb bng bni bnn bno bnz bob bog boi bon boo boz bzn bzo bzz gbg gbi gbn gbo gbz ggb ggg ggi ggn ggo ggz gib gig gii gin gio giz gnb gni gnn gno gob gog goi gon goo goz gzo ibb ibg ibi ibn ibo ibz igb igg igi ign igo iib iii iin iio in- inb ing ini inn ino io- iob iog ioi ion ioo izi izo izz n-i nbb nbg nbi nbn nbo ngb ngg ngi ngn ngo nib nig nii nin nio niz nnb nng nni nnn nno nnz no- nob nog noi non noo noz nzb nzg nzi nzo nzz o-i ob- obb obg obi obn obo ogg ogi ogn ogo oib oii oin oio oiz on- onb ong oni onn ono oo- oob oog ooi oon ooo ozo ozz z-g zbb zgb zgg zgi zib zig zin zio ziz znn zno zo- zob zog zoi zon zoo zzz