
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
There are coins with values of 1, 2, 3, and 5 cruzeiros, each valued at their respective weights in grams (1, 2, 3, and 5 grams). It has been found that one of them is fake and differs in weight from the normal (but it is not known whether it is heavier or lighter than the real one). How can the fake coin be identified with the fewest weighings on a balance scale without weights?

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