[zwvicgaa] Sudoku input gesture

Filling in a square in a sudoku grid with 3 taps on a 3x3 grid on a touchscreen is elegant: first tap to select the larger 3x3 square, second to select individual square within the larger square, third to select a digit.  Could also be done with physical buttons, like numeric keypad.

On a touchscreen, some sequences of taps could be combined into a gesture, a swipe, though there are complications.  What should be done about multiple taps on the same square, and swipes traveling through a square that aren't relevant?

Speed contest: a single number in a grid is shown.  Do the taps or gesture to input the number at the location as quickly as possible.