1: (0 4 15)

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

2: (3 21 5)

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

3: (4 18 6)

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

4: (7 19 17)

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