3. The method of claim 1 , further comprising: determining, by the computing device, a shape of the second path, and wherein removing the second character is based on the determined shape of the second path.
5. The method of claim 3 , further comprising: determining, by the computing device, a position of the computing device when the second path retraced the portion of the first path, and wherein removing the second character is based on the determined position of the computing device and the shape of the second path.