1: (1 7 12)

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

2: (2 5 12)

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

3: (4 20 6)

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

4: (0 18 3)

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