1: (0 2 12)

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

2: (1 15 7)

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

3: (2 13 18)

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

4: (3 21 10)

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