bbb bbg bbi bbn bbo bbr bgb bgg bgi bgn bgo bgr bgz bi- bib big bii bin bio bir biz bnb bng bni bnn bno bnr bnz bob bog boi bon boo bor boz brb brg bri brn bro brr brz bzn bzo bzr bzz gbg gbi gbn gbo gbr gbz ggb ggg ggi ggn ggo ggr ggz gib gig gii gin gio gir giz gnb gni gnn gno gnr gob gog goi gon goo gor goz grb grg gri grn gro grr gzo gzr ibb ibg ibi ibn ibo ibr ibz igb igg igi ign igo igr iib iii iin iio iir in- inb ing ini inn ino inr io- iob iog ioi ion ioo ior ir- irb irg iri irn iro irr izi izo izz n-i nbb nbg nbi nbn nbo nbr ngb ngg ngi ngn ngo nib nig nii nin nio nir niz nnb nng nni nnn nno nnz no- nob nog noi non noo nor noz nrb nrg nri nrn nro nrr nrz nzb nzg nzi nzo nzz o-i ob- obb obg obi obn obo obr ogg ogi ogn ogo oib oii oin oio oir oiz on- onb ong oni onn ono onr oo- oob oog ooi oon ooo oor or- orb org ori orn oro orr orz ozo ozz rbb rbg rbi rbn rbo rbr rgb rgg rgi rgn rgo rgr rib rig rii rin rio rir riz rnb rng rni rnn rno rnr rnz rob rog roi ron roo ror roz rrb rrg rri rrn rrr rzb rzo z-g zbb zbr zgb zgg zgi zib zig zin zio zir ziz znn zno zo- zob zog zoi zon zoo zor zro zzr zzz