1: (0 7 11)

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

2: (6 14 9)

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

3: (5 18 11)

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

4: (8 16 13)

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