
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
There are 9 people in a trench. Imagine that there are 9 people in one trench in the picture. The sergeant at position 1 wants to move to the other end of the trench (point 1), but all other soldiers must remain in their positions. The trench is too narrow for two people to pass by each other, and climbing over each other's backs is quite dangerous. However, using three niches (each holding one person), achieving this is not difficult at all.

How can this be done in the fewest number of moves? A person can move any distance in one move as long as the space is available.



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