1: (0 5 10)

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

2: (1 20 7)

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

3: (3 8 6)

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

4: (5 11 12)

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