777       
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   7 7  77   
   7 7 7 ~~  
   7 77~~7   
   7 7 ~7    
   7  ~7   { 
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   7S~7#   { 
   7 t 7#    
   7   ~7  { 
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7$~~~~  ~ ~~7
7~~~~~~~~~  ~
777~ ~~~~ 77 
  77 ~~~ ~7  
   7~~~~ ~   
    ~~~