1: (0 8 10)

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

2: (7 11 9)

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

3: (6 19 10)

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

4: (3 21 16)

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