
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
Define a set S' consisting of triangles with integer sides a, b, c, where each side is less than 8, the perimeter (a+b+c) of each triangle is even, and no two triangles in S' are congruent or similar. What is the largest number of elements that S' can contain?
A) 7  
B) 8  
C) 9  
D) 10  
E) 11

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