1: (0 8 10)

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

2: (5 12 9)

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

3: (1 20 6)

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

4: (8 14 10)

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