Question 991001
<pre>
There are only 10.  Just list them: No
need to calculate them:


    O        O        O        O        O        
  B   G    B   B    B   G    B   G    B   B    
   G B      G O      G O      O B      O G 


    O        O        O        O        O        
  G   B    G   B    G   G    G   G    G   B    
   B G      B O      B O      O B      O G 

Edwin</pre>