1: (3 7 12)

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

2: (7 14 17)

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

3: (13 20 15)

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

4: (10 18 16)

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