1: (1 6 20)

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

2: (0 19 3)

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

3: (1 6 20)

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

4: (2 7 4)

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