1: (6 8 15)

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

2: (4 10 7)

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

3: (6 8 15)

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

4: (9 17 11)

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