77                                           
  77777.~                                          
  7.7..~~~                                         
  ~..~.~^77                                        
   .~~..~.77                                       
    7..~~7.777                                     
    7....~~~~777               .777                
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         7~.7..~~~.~..7    7.7~.~0~~~...~~~Di~.7   
         7..(.7.~~~~~77   77~.~.~~~~..~~~~FtR.77   
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           7.  7.0~~.7   7.~~0~7~~~~....~~...77    
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               77.7...7..~~..77777.~7.~7~...7      
               70~~.7.......77   7.~~.~~~..7       
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              7~~~.77.7~~~.7     7.~~~0~.7~7       
              77.~. 77....77     7.~~~~~.7         
               7.t.  77..77      7.~77~~.7         
               ~~~    7.77       7~~~~0~~7         
                      7.7        7~>~~~~.7         
                      .~.        777..~~~7         
                     77~7           77.~.7         
                      777             7~.7         
                                       7..7        
                                        7.7        
                                         77