
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 marksman is shooting at a triangular grid. Each time he hits a triangular cell, the shot lands either in that cell or in one of its adjacent cells sharing a side. He sees the results of his shots and can choose when to stop shooting. What is the maximum number of triangular cells he can guarantee to hit exactly five times?

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