
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
Given that $A$ and $B$ are non-empty sets, define the operation $A-B=\{x|x\in A \text{ and } x\notin B\}$. If $M=\{x|y= \sqrt{1-x}\}$, $N=\{y|y=x^2\}$, $-1\leq x\leq 1$, then $M-N= \_\_\_\_\_\_$.

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