1: (2 6 15)

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

2: (0 7 4)

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

3: (2 6 15)

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

4: (1 20 3)

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