
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
In an editorial office, editors submit articles numbered from 1 to 10 to a reviewer's queue throughout the day. They submit them in the reverse order from 10 to 1. At some point before the reviewer goes to lunch, they review articles 2 and 3, but it is not known which other articles, if any, have been reviewed by then. When the reviewer returns, they will continue to review articles at the top of the queue. How many possible sequences of reviewing are left for the reviewer to follow after lunch?

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