1: (3 7 11)

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

2: (6 13 9)

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

3: (3 7 11)

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

4: (10 20 12)

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