
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 a family photo album, there are ten photographs. Each photograph shows three people: a man standing in the center, his son standing to the left of him, and his brother standing to the right of him. What is the minimum number of different people that can be depicted in these photographs, given that the ten men standing in the center are all different?

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