
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
An ancient human tribe had a hierarchical system where there was one chief with 2 supporting chiefs (supporting chief A and supporting chief B). Each supporting chief had 1 assistant and 2 inferior officers. If the tribe at one point had 15 members, what is the number of different ways to choose this extended leadership of the tribe?

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