                    \
   1 /|    2 /|       ^                     \
    *-+-----* |       |                v0    \       v3
    | |4    | |7      | ◄╮               *----\-----*
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    |/      |/       / ⤴               /        o     \
    *-------*       v                 /                \
   5       6      +z              v1 *------------------* v2
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