bbb bbd bbg bbi bbr bdb bdd bdg bdi bdr bgb bgd bgg bgi bgr bi- bib bid big bii bir brb brd brg bri brr dbb dbd dbg dbi dbr ddb ddd ddg ddi ddr dgd dgg dgi dgr di- dib did dig dii dir drb drd drg dri drr g-d gbd gbg gbi gbr gdb gdd gdi gdr ggb ggd ggg ggi ggr gib gid gig gii gir grb grd grg gri grr i-d ibb ibd ibg ibi ibr idb idd idg idi idr igb igd igg igi igr iib iid iii iir ir- irb ird irg iri irr rbb rbd rbg rbi rbr rdb rdd rdg rdi rdr rgb rgd rgg rgi rgr rib rid rig rii rir rrb rrd rrg rri rrr