1: (0 2 4)

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

2: (1 20 3)

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

3: (4 7 9)

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

4: (6 12 8)

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