1: (0 2 7)

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

2: (1 8 6)

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

3: (4 7 21)

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

4: (3 10 5)

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