
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 bus company's parking lot has 15 buses. Starting from 6 a.m., the first bus departs, and thereafter, a bus departs every 6 minutes. Three minutes after the first bus departs, a bus enters the parking lot, and thereafter, a bus enters every 8 minutes. The buses that enter will depart after the original 15 buses in sequence. When will the parking lot be empty for the first time?

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