
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
Five buses are standing one after another in a traffic jam, with each bus carrying a different nonzero number of passengers. We define two different people as fellow sufferers if they are either on the same bus or on neighboring buses. It turns out that each passenger has either exactly 20 or exactly 30 fellow sufferers. Provide an example of how this is possible.

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