1: (0 1 8)

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

2: (1 10 13)

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

3: (6 14 12)

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

4: (2 21 9)

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