1: (0 8 18)

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

2: (6 20 17)

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

3: (3 8 19)

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

4: (2 16 4)

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