1: (0 9 15)

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

2: (8 18 14)

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

3: (7 11 15)

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

4: (10 16 13)

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