
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
The TV station is continuously broadcasting 6 commercials, which include 4 different commercial advertisements and 2 different public service advertisements. If it is required that the broadcast must start and end with a public service advertisement, then there are _______ different broadcasting methods (express the result with a numeric value).

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