1: (4 6 8)

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

2: (1 6 18)

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

3: (0 16 2)

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

4: (1 8 3)

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