1: (0 5 18)

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

2: (2 21 13)

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

3: (1 7 4)

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

4: (6 18 8)

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