
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Tessa the hyper-ant has a 2019-dimensional hypercube. For a real number \( k \), she calls a placement of nonzero real numbers on the \( 2^{2019} \) vertices of the hypercube \( k \)-harmonic if for any vertex, the sum of all 2019 numbers that are edge-adjacent to this vertex is equal to \( k \) times the number on this vertex. Let \( S \) be the set of all possible values of \( k \) such that there exists a \( k \)-harmonic placement. Find \( \sum_{k \in S}|k| \).

Present the answer in LaTex format: \boxed{Your answer}
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