1: (0 7 15)

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

2: (6 19 8)

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

3: (7 17 13)

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

4: (12 16 14)

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