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  ........................vvvv.......vvvvv.....vvvvvvv....................~~~
  ........................vvvv.......vvvvvvv..vvvvvvv....................~~~
   .....................vvvvv.........vvvvvvvvvvvv......................~~~
   ....................vvvvvv...........vvvvvvvvvv.....................~~~
     ...............vvvvvvvv.............vvvvvvv......................~~
        ........vvvvvvvvvvv...vvvv......vvvvvv.......................
            ...vvvvvvvvvv....vvvvv......vvvv.....................
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                     .......vvvv........................
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