
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
Use systematic sampling to select a sample of size 20 from 300 students. Number the students from 1 to 300, and divide them into 20 groups in numerical order. If the number drawn from the 16th group is 231, what is the number drawn from the 1st group using the lottery method?

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