1: (1 6 13)

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

2: (0 8 2)

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

3: (4 9 7)

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

4: (6 20 11)

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