1: (0 1 3)

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

2: (3 8 20)

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

3: (2 10 4)

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

4: (7 13 9)

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