
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
A two-digit number $N$ is formed such that when the number with its digits reversed is subtracted from it, the result is a positive perfect square. What is the smallest possible value of $N$?
A) 81
B) 90
C) 99
D) 45

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