1: (0 1 5)

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

2: (3 5 20)

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

3: (2 6 4)

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

4: (1 15 5)

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