1: (0 3 7)

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

2: (2 9 5)

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

3: (0 3 7)

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

4: (6 15 8)

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