
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
In triangle \(ABC\), angle \(A\) is \(\alpha\) and \(BC = a\). The incircle touches lines \(AB\) and \(AC\) at points \(M\) and \(P\). Find the length of the chord cut on the line \(MP\) by the circle with diameter \(BC\).

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