1: (0 1 7)

(0)(1 15 14 10 7 20 18)(2 21 4)(3 16 12 8 5)(6 11 9)(13 19 17)

2: (1 15 18)

(0)(1)(2 21 4)(3 16 12 8 5)(6 11 9)(7 20 18 14 10)(13 19 17)(15)

3: (13 19 17)

(0)(1)(2 21 4)(3 16 12 8 5)(6 11 9)(7 20 18 14 10)(13)(15)(17)(19)

4: (7 20 18)

(0)(1)(2 21 4)(3 16 12 8 5)(6 11 9)(7 14 10)(13)(15)(17)(18)(19)(20)