
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 TV station is broadcasting 6 advertisements in a row, including 4 different commercial advertisements and 2 different public service advertisements. The requirement is that public service advertisements must be played at the beginning and the end. How many different broadcasting methods are there? (Express the result as a numerical value.)

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