
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 the 800 students are numbered from 1 to 800 and that the middle school adopts a systematic sampling method to conduct dental health checks on 50 out of these students, with 39 being selected from the numbers 33 to 48, which are part of the first 16 numbers, determine the number that was randomly selected from the first group of numbers 1 to 16.

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