1: (0 6 8)

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

2: (3 10 7)

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

3: (2 14 4)

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

4: (6 12 9)

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