1: (2 7 16)

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

2: (7 17 18)

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

3: (1 9 3)

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

4: (6 11 8)

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