
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
In their base \(10\) representations, the integer \(a\) consists of a sequence of \(1500\) sixes and the integer \(b\) consists of a sequence of \(1500\) threes. What is the sum of the digits of the base \(10\) representation of \(9ab\)?
A) 12000
B) 13501
C) 15002
D) 16503 
E) 18004

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