1: (0 6 9)

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

2: (2 14 7)

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

3: (6 10 8)

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

4: (1 20 4)

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