
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
All the cells in the top row of a $14 \times 14$ square are filled with water, and one cell contains a sandbag. With each move, Vasya can place sandbags in any 3 unoccupied cells (cells not already filled with water). After each move, water fills each cell that shares a side with a water-filled cell unless that cell contains a sandbag. The process continues as long as water can fill new cells. How should Vasya act so that in the end, the water fills as few cells as possible?

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