Project Euler #252: Convex Holes

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    Can someone elaborate on what

    How many different convex holes are there?

    means, specifically "different". I'm wondering about translation and rotation. If vertices (0, 1, 2) and (3, 4, 5) are generating the same shape but are offset by some (x, y) translation, do they count as different convex holes ?

    What about rotation ?