1: (7 10 19)

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

2: (6 15 8)

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

3: (5 12 9)

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

4: (0 2 10)

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