1: (1 7 9)

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

2: (4 20 8)

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

3: (1 7 9)

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

4: (0 17 2)

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