
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 non-zero natural number that can be expressed as the difference of squares of two non-zero natural numbers is called a "wise number". For example, $16 = 5^2 - 3^2$, so 16 is a "wise number". In the sequence of natural numbers starting from 1, the 1990th "wise number" is.

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