1: (0 1 3)

(0)(1 20 3 7 4)(2 18 17 15 5)(6 12 8)(9 13 10)(11 21 19 16 14)

2: (3 7 20)

(0)(1 20 4)(2 18 17 15 5)(3)(6 12 8)(7)(9 13 10)(11 21 19 16 14)

3: (2 18 5)

(0)(1 20 4)(2)(3)(5 17 15)(6 12 8)(7)(9 13 10)(11 21 19 16 14)(18)

4: (16 21 19)

(0)(1 20 4)(2)(3)(5 17 15)(6 12 8)(7)(9 13 10)(11 21 14)(16)(18)(19)