1: (1 6 8)

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

2: (5 13 7)

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

3: (1 6 11)

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

4: (10 14 12)

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