1: (1 3 15)

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

2: (0 8 2)

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

3: (1 5 18)

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

4: (4 10 6)

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