
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 person comes to a stream with two vessels with capacities of 15 liters and 16 liters, respectively. How can he measure exactly 8 liters of water in the fewest number of operations? Filling a vessel, emptying it, or pouring water from one vessel to another each count as one operation.

No tricks such as making marks on the vessels or tilting them are allowed.

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