
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
The family of beekeepers brought containers of honey with volumes of $13, 15, 16, 17, 19, 21$ liters to the fair. In August, they sold three containers entirely, and in September, they sold two more. It turned out that in August, they sold twice as much honey as in September. Determine which containers were emptied in August. In the answer, indicate the largest of the volumes.

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