
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
Place the integers 1 through 9 on three separate cards, with three numbers on each card. The condition is that the difference between any two numbers on the same card cannot also be on the same card. Currently, the numbers 1 and 5 are on the first card, number 2 is on the second card, and number 3 is on the third card. Find the remaining number to be written on the first card.

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