# Different shapes go to different buckets.
# First, pick two pieces from the leftmost column, then one piece from the
# rightmost column, etc
2 (*,circle,*,L,[0]) (*,triangle,*,L,[1])  (*,square,*,L,[2])  (*,star,*,L,[3])
1 (*,circle,*,R,[0]) (*,triangle,*,R,[1])  (*,square,*,R,[2])  (*,star,*,R,[3])
