
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
Seven friends sat in a movie theater in a single row of seats numbered from 1 to 7. Originally, each friend occupied one seat. During the movie, Gabe went to buy snacks. While he was away:
- Flo moved three seats to the right
- Dan moved one seat to the left
- Cal did not move
- Bea and Eva switched seats
- Hal moved into the seat that was initially on Gabe's right.
When Gabe returned, he found that the only available seat was one on an end. Where was Gabe originally seated?
A) 1
B) 2
C) 3
D) 5
E) 6

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