+---+        +---+
   | A |        | B |
   +---+        +---+
     \           /
      \         /
    target   target
        \    /
       +-----+
       |  D  |
       +-----+
         /
      target
       /
      /
   +---+
   | C |
   +---+

##</code><code>##

   +---+ +---+ +---+
   | C | | B | | C |
   +---+ +---+ +---+
      \    |    /
       \   |   /
        \  |  /
         target
          \|/
         +---+
         | D |
         +---+

##</code><code>##

    +---+ +---+ +---+
    | A | | B | | C |
    +---+ +---+ +---+
       \    |    /
        \   |   /
         \  |  /
          \ | /
           \|/
       +---------+
       | target  |
       |         |
       |    D    |
       |         |
       +---------+