
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
In a mathematics competition, 1000 students are numbered as follows: 0001, 0002, 0003, ..., 1000. A sample of size 50 is to be drawn from these students using systematic sampling method, which divides them into 50 parts. If the first part consists of numbers 0001, 0002, ..., 0020 and number 0010 is randomly selected from this part, then the 41st number is ______.

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