1: (6 9 15)

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

2: (4 10 8)

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

3: (9 19 11)

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

4: (7 16 14)

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