
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
Let the set $B = \{x \in \mathbb{Z} | \frac{6}{3-x} \in \mathbb{N}\}$.
1. Determine the relationship between the elements 1, -1 and the set $B$.
2. Represent the set $B$ using the roster method.

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