
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]


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The class teacher plans to invite graduates of the 2016 class to give speeches, selecting 4 speakers from 8 candidates including A and B, with the requirement that at least one of A and B must participate. If both A and B participate, there must be exactly one person speaking between them. The total number of different speaking orders is \_\_\_\_\_\_\_\_. (Answer with a number)

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