1: (0 3 17)

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

2: (1 20 8)

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

3: (2 19 4)

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

4: (3 18 5)

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