
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
Parking spaces of equal length are marked along the beach. The vehicles park one behind the other, and all drivers adhere to the marked spaces. The parking area is reserved exclusively for buses, and each bus occupies exactly three parking spaces.

At a certain moment, there were only two buses in the parking lot - one occupied the fifth to seventh spaces from the left, and the other occupied the eighth to tenth spaces from the right. Later, four more buses parked there, and if one more bus arrived, there would be no sufficiently large space to park. Determine the maximum number of parking spaces that could be in the parking lot.

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