1: (3 6 7)

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

2: (7 11 13)

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

3: (10 15 12)

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

4: (6 13 9)

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