ELECTRONIC	h   t   t   p   c o l o n   s l a s h   s l a s h   p u z z l e m u s e u m dot c o m   s l a s h   g r i d d l e r   s l a s h   g r i d h i s t dot h   t   m	http://puzzlemuseum.com/griddler/gridhist.htm	1