
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 an acute-angled triangle  $ABC$ , the point  $O$  is the center of the circumcircle, and the point  $H$  is the orthocenter. It is known that the lines  $OH$  and  $BC$  are parallel, and  $BC = 4OH $ . Find the value of the smallest angle of triangle  $ ABC $ .

(Black Maxim)

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