
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
Every card in a deck displays one of three symbols - star, circle, or square, each filled with one of three colors - red, yellow, or blue, and each color is shaded in one of three intensities - light, normal, or dark. The deck contains 27 unique cards, each representing a different symbol-color-intensity combination. A set of three cards is considered harmonious if:
i. Each card has a different symbol or all three have the same symbol.
ii. Each card has a different color or all three have the same color.
iii. Each card has a different intensity or all three have the same intensity.
Determine how many different harmonious three-card sets are possible.

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