1: (9 12 17)

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

2: (3 6 12)

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

3: (5 20 7)

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

4: (6 17 8)

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