
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 1000 students are numbered as follows: 0001, 0002, 0003, …, 1000, and a sample of size 50 is to be drawn using systematic sampling, divided into 50 parts, determine the 20th number if the number 0015 is randomly selected from the first part.

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