1: (2 7 11)

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

2: (6 20 7)

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

3: (1 16 3)

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

4: (0 18 4)

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