1: (1 15 20)

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

2: (1 5 10)

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

3: (0 8 2)

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

4: (4 11 6)

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