1: (4 9 12)

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

2: (3 9 7)

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

3: (8 13 10)

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

4: (1 12 7)

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