1: (0 4 12)

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

2: (3 19 8)

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

3: (6 12 21)

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

4: (5 9 7)

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