
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
What digit should be placed instead of the question mark in the number 888...88?99...999 (with the eights and nines written 50 times each) so that it is divisible by 7?

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