1: (0 4 8)

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

2: (1 20 7)

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

3: (2 18 4)

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

4: (3 10 5)

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