(display-game-state                  
       (human-move (make-game-state 4 0)))
                                         
     Which pile will you remove from?
     foo
     Bad pile number.  Try again.     
     Which pile will you remove from?        
     2                                       
     Bad pile number.  Try again.     
     Which pile will you remove from?        
     3                                       
     Bad pile number.  Try again.               
     Which pile will you remove from?        
     1                                       
                                         
     How many coins do you want to remove?   
     bar
     Bad number of coins.  Try again.     
     How many coins do you want to remove?        
     0                                       
     Bad number of coins.  Try again.                              
     How many coins do you want to remove?   
     3                                       
                                         
         Pile 1: 1                           
         Pile 2: 0