1: (6 8 16)

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

2: (4 10 7)

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

3: (8 18 12)

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

4: (9 17 15)

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