1: (1 6 15)

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

2: (0 9 2)

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

3: (5 12 8)

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

4: (1 7 18)

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