
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
Five friends were seated in a row of 5 seats, numbered 1 to 5. Ada left to buy snacks. Meanwhile, Bea moved one seat to the right, Ceci moved one seat to the left and then back to her original position, and Dee and Edie switched seats with Edie then moving one seat to the right. Upon returning, Ada found an empty end seat and sat there. Where was Ada originally seated?
A) Seat 1
B) Seat 2
C) Seat 3
D) Seat 4
E) Seat 5

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