1: (3 10 12)

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

2: (9 14 11)

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

3: (2 13 4)

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

4: (1 12 8)

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