
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
Athletes started in groups of 3 people with a delay of several seconds between groups. Petya, Vasya, and Kolya started simultaneously in the seventh group from the beginning and in the fifth group from the end. How many athletes participated in the race?

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