1: (0 15 18)

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

2: (6 20 17)

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

3: (1 16 13)

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

4: (3 15 19)

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