1: (2 8 16)

(0 9 7)(1 19 5)(2 8 16)(3 14 4)(6 12 10)(11 17 13)(15 20 18)

2: (0 9 7)

(0)(1 19 5)(2 8 16)(3 14 4)(6 12 10)(7)(9)(11 17 13)(15 20 18)

3: (2 8 16)

(0)(1 19 5)(2)(3 14 4)(6 12 10)(7)(8)(9)(11 17 13)(15 20 18)(16)

4: (1 19 5)

(0)(1)(2)(3 14 4)(5)(6 12 10)(7)(8)(9)(11 17 13)(15 20 18)(16)(19)