+--+
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 |   | +
 |   |/
 +---+
      +--------+
     /        /|
    /        / |
   +--------+  |
   |        |  |
   |        |  +
   |        | /
   |        |/
   +--------+
   +--+
  /   /|
 +---+ |
 |   | +
 |   |/
 +---+
      +--------+
     /        /|
    /        / |
   +--------+  |
   |        |  |
   |        |  +
   |        | /
   |        |/
   +--------+
   +--+
  /   /|
 +---+ |
 |   | +
 |   |/
 +---+
      +--------+
     /        /|
    /        / |
   +--------+  |
   |        |  |
   |        |  +
   |        | /
   |        |/
   +--------+
   +--+
  /   /|
 +---+ |
 |   | +
 |   |/
 +---+
      +--------+
     /        /|
    /        / |
   +--------+  |
   |        |  |
   |        |  +
   |        | /
   |        |/
   +--------+
   +--+
  /   /|
 +---+ |
 |   | +
 |   |/
 +---+
      +--------+
     /        /|
    /        / |
   +--------+  |
   |        |  |
   |        |  +
   |        | /
   |        |/
   +--------+
   +--+
  /   /|
 +---+ |
 |   | +
 |   |/
 +---+
      +--------+
     /        /|
    /        / |
   +--------+  |
   |        |  |
   |        |  +
   |        | /
   |        |/
   +--------+
   +--+
  /   /|
 +---+ |
 |   | +
 |   |/
 +---+
      +--------+
     /        /|
    /        / |
   +--------+  |
   |        |  |
   |        |  +
   |        | /
   |        |/
   +--------+
   +--+
  /   /|
 +---+ |
 |   | +
 |   |/
 +---+
      +--------+
     /        /|
    /        / |
   +--------+  |
   |        |  |
   |        |  +
   |        | /
   |        |/
   +--------+