1: (4 8 12)

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

2: (5 13 11)

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

3: (1 8 6)

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

4: (7 14 9)

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