A delivery drone needs to travel from its base station at (0,0) to a drop-off point located 4 units east and 3 units north. The drone can only move one unit east or one unit north at a time. There is a no-fly zone covering the intersection at (2,2). How many distinct paths can the drone take from (0,0) to (4,3) while avoiding the point (2,2)?
15
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20