1: (0 4 12)

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

2: (2 19 5)

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

3: (4 14 7)

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

4: (6 13 11)

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