Table 1: Transformation rules of Lee's algorithm.


(0, 0)(0, 0)(0, 1)(0, −2)
(0, 1)(0, 0)(0, 2)(0, 2)
(1, 0)(0, 0)(1, 1)(0, −2)
(1, 1)(0, 0)(1, 0)(0, 2)