1: (0 6 19)

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

2: (4 20 17)

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

3: (0 6 19)

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

4: (1 7 5)

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