1: (0 7 11)

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

2: (1 20 8)

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

3: (5 12 9)

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

4: (7 15 11)

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