
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
Emily walks alongside a riverbank at different speeds when walking in opposite directions, observing a ship moving at a constant speed. When she walks faster than the ship moving downstream, she takes $250$ equal steps from the back of the ship to the front. When walking slower than the ship moving upstream, she counts $50$ steps from the front to the back. Assuming her step size remains constant, determine the length of the ship in terms of Emily's steps.
A) 80
B) 82
C) 84
D) 85
E) 86

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