1: (0 7 18)

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

2: (5 20 8)

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

3: (0 3 6)

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

4: (2 10 4)

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