1: (6 10 15)

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

2: (0 3 10)

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

3: (2 18 4)

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

4: (3 15 5)

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