1: (1 7 15)

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

2: (0 12 2)

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

3: (1 7 15)

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

4: (6 13 11)

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