1: (0 1 15)

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

2: (4 15 21)

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

3: (3 17 9)

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

4: (2 18 16)

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