1: (2 7 12)

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

2: (0 10 4)

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

3: (9 15 11)

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

4: (2 17 13)

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