
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
The sequence 1, 1, 2, 3, 5, 8, 13, 21... is arranged in such a way that starting from the third number, each number is the sum of the two numbers before it. This sequence is called the Fibonacci sequence. In the first 2008 numbers of the Fibonacci sequence, there are a total of $\boxed{\text{even numbers}}$.

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