
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
Six friends are sitting in a movie theater in a row containing $6$ seats, numbered $1$ to $6$ from left to right. Initially, one seat is empty and the rest are occupied by friends Ada, Bea, Ceci, Dee, Edie, and Faye. During the movie, Bea moved three seats to the right and Ceci moved two seats to the right, while Dee and Edie switched seats. When Ada returned from the lobby, she found an end seat empty for herself. Determine Ada's original seat.
A) Seat 1
B) Seat 2
C) Seat 3
D) Seat 4
E) Seat 5
F) Seat 6

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