It's best to begin this installment with the end. I was in the airport waiting for the plane to board, and I decided to get myself a Coke®, so I did. The lady at the counter said "two hundred" so, I took on of the few two thousand ryal notes I had left out of my pocket, and gave it to her. "No," she said patiently, "Two hundred Thum. That's 20,000 Ryals." What the heck is a thum, and why hadn't I heard of this thing before?
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