1: (0 3 15)

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

2: (6 15 20)

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

3: (5 17 7)

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

4: (3 18 15)

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