1: (0 1 7)

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

2: (1 9 12)

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

3: (8 14 11)

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

4: (7 20 12)

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