
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
Arrange the natural numbers 1, 2, 3, 4, …, 1986, 1987 into a large circle evenly. Starting from 1, count as follows: skip 1 and eliminate 2, 3; then skip 4 and eliminate 5, 6. Continue in this manner, skipping one number and eliminating the next two, going around the circle. Which number will be the last remaining?

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