1: (2 5 9)

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

2: (9 12 16)

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

3: (8 13 11)

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

4: (3 17 15)

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