1: (8 12 15)

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

2: (10 17 13)

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

3: (6 11 9)

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

4: (2 15 7)

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