
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
A farmer decided to divide his herd of cows among his four sons. The first son received $\frac{2}{3}$ of the cows, the second son $\frac{1}{6}$, and the third son $\frac{1}{9}$. The rest went to the fourth son. If the fourth son received 6 cows, how many cows were there in total in the herd?
A) 100
B) 108
C) 120
D) 130

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