
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 senior second-year class (1) of a certain school, there are a total of 48 students with consecutive numbers from 1 to 48. A sample of 4 students is drawn using systematic sampling. Given that students numbered 6, 30, and 42 are in the sample, the number of the fourth student in the sample is __________.

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