
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
Bricklayer Brenda can build a chimney in 8 hours working alone, and bricklayer Bob can build the same chimney in 12 hours working alone. When working together, they get distracted and their combined productivity decreases by 15 bricks per hour. How many bricks are in the chimney if they finish it jointly in 6 hours?
A) 300
B) 360
C) 450
D) 500
E) 540

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