
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
Arrange the numbers 1, 2, ..., 7 in a row such that the sum of the first item, the sum of the first two items, the sum of the first three items, and so on, up to the sum of all seven items are not divisible by 3. How many different arrangements are there?

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