1: (1 5 18)

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

2: (0 7 2)

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

3: (1 5 18)

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

4: (4 20 17)

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