Detect Tap on sides of the phone (Windows Phone)

Detect Tap on sides of the phone (Windows Phone)

I would like to know how to detect tapping (or slight jerk) on any side of the phone. I mean to say that, I want to perfom a task, when the phone is tapped on the top, and something else when it is tapped from the sides. How would I detect such motion using the accelerometer on Windows Phone? This may sound silly, but a solution will be great.

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