
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
CCTV Channel 1 is scheduled to broadcast 5 advertisements in a row, including 3 different commercial advertisements and 2 different public service announcements (PSAs). The requirement is that the last advertisement must be a PSA, and the two PSAs cannot be broadcast consecutively. How many different broadcasting sequences are there?

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