1: (2 6 12)

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

2: (0 10 4)

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

3: (9 13 11)

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

4: (2 16 5)

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