1: (0 3 9)

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

2: (1 20 7)

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

3: (5 9 12)

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

4: (2 18 4)

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