1: (3 8 10)

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

2: (6 12 8)

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

3: (5 20 7)

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

4: (6 13 10)

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