1: (0 4 5)

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

2: (5 10 12)

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

3: (9 15 11)

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

4: (4 12 8)

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