
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
On the surface of a sphere $O$, from a point $A$, three chords $AB$, $AC$, $AD$ of equal length are drawn, and the angle between any two of them is $60^{\circ}$. If the radius of the sphere is $3$, then the length of the chord $AB$ is ______.

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