1: (0 5 7)

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

2: (2 10 6)

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

3: (5 8 9)

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

4: (1 14 3)

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