1: (2 9 15)

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

2: (4 17 12)

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

3: (6 13 11)

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

4: (5 9 7)

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