1: (1 5 9)

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

2: (4 17 7)

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

3: (6 12 8)

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

4: (1 13 11)

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