
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
Let the line \( l: y = kx + m \) (where \( k \) and \( m \) are integers) intersect the ellipse \( \frac{x^2}{16} + \frac{y^2}{12} = 1 \) at two distinct points \( A \) and \( B \), and intersect the hyperbola \( \frac{x^2}{4} - \frac{y^2}{12} = 1 \) at two distinct points \( C \) and \( D \). Determine if there exists such a line \( l \) such that the vector \( \overrightarrow{AC} + \overrightarrow{BD} = 0 \). If such a line exists, specify how many such lines there are. If no such line exists, provide reasoning.

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