From: ehsan.khoddam@gmail.com   
      
   Hi   
   I want to solve to rubik cube by A* search, I found some heuristics ,   
   it's wondering if anyone could help me to find more better heuristics   
   (reference to a paper or a web page)? if you know any admissible   
   heuristic i will happy if you share it with me.   
      
   thanx   
   Ehsan   
      
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