1. A device comprising: a memory, and a computing device coupled with the memory and configured to: determine that a first hand and a second hand are occluded, the first hand having come from a first direction and the second hand having come from a second direction; track movement of the occluded hands, the occluded hands being tracked as a unit; determine a type of synchronization characterizing the occluded hands based on the tracked movement of the occluded hands; determine that the first hand and the second hand are no longer occluded; and distinguish, after determining that the first hand and the second hand are no longer occluded, the first hand from the second hand based on the determined type of synchronization.