1: (0 1 15)

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

2: (4 15 21)

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

3: (3 19 9)

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

4: (1 20 15)

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