1: (0 6 12)

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

2: (1 20 8)

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

3: (5 9 7)

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

4: (2 6 13)

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