1: (0 2 17)

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

2: (1 20 4)

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

3: (2 19 6)

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

4: (3 18 15)

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