
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
Eighteen children solved a problem from the April issue of KöMaL. They want to discuss their solutions via email. What is the minimum number of emails they need to send to ensure that each of them learns about every solution? (Each email counts as many times as the number of people it is sent to.)

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