
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
A systematic sampling method is used to select 32 people from a group of 960 for a questionnaire survey. They are randomly numbered from 1 to 960. Among the selected 32 people, those whose numbers fall within the interval [1, 450] complete questionnaire A, those whose numbers fall within the interval [451, 750] complete questionnaire B, and the rest complete questionnaire C. The number drawn by the 5th group is 129. Find the number drawn by the 1st group.

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