
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
A point A is initially located at the number 2 on the number line. It then moves according to the following rules: During the 1st move, point A moves 1 unit to the left to point A₁, during the 2nd move, it moves 2 units to the right from point A₁ to point A₂, during the 3rd move, it moves 3 units to the left from point A₂ to point A₃, and so on. What number does point A₂₀₁₉ represent?

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