1: (5 10 16)

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

2: (4 11 9)

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

3: (10 18 12)

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

4: (15 20 17)

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