1: (6 10 15)

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

2: (8 17 11)

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

3: (10 16 12)

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

4: (5 9 7)

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