1: (6 8 15)

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

2: (4 9 7)

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

3: (1 10 8)

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

4: (0 5 3)

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