1: (0 2 6)

(0)(1 18 3)(2 20 12 8 6 16 4)(5 15 14 10 7)(9 13 11)(17 21 19)

2: (1 18 3)

(0)(1)(2 20 12 8 6 16 4)(3)(5 15 14 10 7)(9 13 11)(17 21 19)(18)

3: (12 16 20)

(0)(1)(2 20 4)(3)(5 15 14 10 7)(6 16 8)(9 13 11)(12)(17 21 19)(18)

4: (5 15 7)

(0)(1)(2 20 4)(3)(5)(6 16 8)(7 14 10)(9 13 11)(12)(15)(17 21 19)(18)