1: (2 6 11)

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

2: (0 7 4)

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

3: (2 6 11)

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

4: (1 15 3)

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