
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
One side of the cards is painted in some color, and the other has a smiley face. There are four cards in front of you: the first is yellow, the second is black, the third has a happy smiley, and the fourth has a sad smiley. You need to check the statement: "If there is a happy smiley on one side of a card, then the other side is painted yellow."

What is the minimum number of cards you need to turn over to check the truth of this statement? Which ones? (7 points)

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