1: (0 3 7)

(0)(1 20 13)(2 21 4)(3 19 10 8 7 18 16)(5 14 11 9 6)(12 17 15)

2: (3 8 16)

(0)(1 20 13)(2 21 4)(3)(5 14 11 9 6)(7 18 16)(8 19 10)(12 17 15)

3: (1 20 13)

(0)(1)(2 21 4)(3)(5 14 11 9 6)(7 18 16)(8 19 10)(12 17 15)(13)(20)

4: (12 17 15)

(0)(1)(2 21 4)(3)(5 14 11 9 6)(7 18 16)(8 19 10)(12)(13)(15)(17)(20)