1: (7 9 15)

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

2: (6 10 8)

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

3: (9 17 11)

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

4: (4 16 14)

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