Popolygon
There is a polygon. Each angle of the polygon is 90° or 270°. Furthermore every side of the polygon has an integer length.
If a side's length is an even number, then the two angles at the endpoints of the side are different.
If a side's length is an odd number, then the two angles at the endpoints of the side are the same.
Is the area of the polygon an even or an odd number?
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