
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
Ellis's Eel Emporium contains a large tank holding three different types of eel: electric eels, moray eels, and freshwater eels. A notice on the tank reads as follows:
- All the eels are electric eels except 12
- All the eels are moray eels except 14
- All the eels are freshwater eels except 16

How many eels are in the tank? 

A) 42  
B) 33  
C) 24  
D) 21  
E) 20

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