Brain Teaser

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You're driving a bus that is leaving from Pennsylvania and ending in New York.
To start off with, there were 32 passengers on the bus.
At the next bus stop, 11 people get off and 9 people get on.
At the next bus stop, 2 people got off and 2 people got on.
At the next bus stop, 12 people got on and 16 people got off.
At the next bus stop, 5 people got on and 3 people got off.
What color are the bus driver's eyes?
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