
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
If a sequence $\{a_n\}$ satisfies $a_n + a_{n+1} = h$ for any positive integer $n$ (where $h$ is a constant), the sequence is called an equal sum sequence, and $h$ is the common sum. Denote $S_n$ as the sum of the first $n$ terms. Given that in the equal sum sequence $\{a_n\}$, $a_1 = 1$ and $h = -3$, find $S_{2008}$.

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