
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
Thirteen people are standing in a circle. A ball is initially with the first person, Bob, who throws the ball clockwise but skips two people and throws it to the fourth person. This person then continues the pattern by skipping two people and throwing to the fourth person in sequence. How many total throws are necessary for the ball to return to Bob?

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