
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 cylinder post has a circumference of 4 feet and is wrapped with string, spiraling evenly from bottom to top. The string completes five loops exactly, starting from the bottom and finishing at the top of the post. If the post's height is 15 feet, what is the length of the string?

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