
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
An engineering task needs to be done. Person A working alone requires 6 hours, Person B requires 8 hours, and Person C requires 10 hours. All three start working together at 8 AM, then Person A leaves at some point. If the task is completed by 12 PM, at what time did Person A leave?

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