
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
Xiao Li takes the same number of coins from the first pile as there are in the second pile and puts them into the second pile; then, he takes the same number of coins from the second pile as there are in the third pile and puts them into the third pile; finally, he takes the same number of coins from the third pile as there are in the existing first pile and puts them into the first pile. Determine the number of coins originally in the first pile, given that each pile ends up with 16 coins.

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