1: (0 2 6)

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

2: (2 7 11)

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

3: (5 13 9)

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

4: (10 14 12)

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