1: (0 1 15)

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

2: (4 15 21)

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

3: (3 19 9)

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

4: (6 17 14)

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