
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
Four foreign guests are visiting a school and need to be accompanied by two security officers. The six individuals enter the school gate in sequence, and for safety reasons, the two security officers must be at the front and back. If foreign guests A and B must be together, then the total number of possible entry sequences for the six individuals is \_\_\_\_\_\_.

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