1: (2 7 12)

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

2: (1 10 5)

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

3: (9 13 11)

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

4: (3 14 12)

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