
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
On an island, there are two tribes: knights, who always tell the truth, and liars, who always lie. Four islanders stand in a row, each 1 meter apart from the next.

- The leftmost person in the row said: "My fellow tribesman in this row stands 3 meters away from me."
- The rightmost person in the row said: "My fellow tribesman in this row stands 2 meters away from me."

It is known that there are exactly two knights and two liars in the row. What distances could the second and third islanders from the left mention? Indicate all possible options.

### Options to consider:

Second islander: 
- 1 meter
- 2 meters
- 3 meters
- 4 meters

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