1: (2 10 15)

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

2: (0 12 3)

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

3: (9 13 11)

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

4: (1 15 8)

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