1: (3 6 15)

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

2: (1 8 4)

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

3: (3 6 15)

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

4: (5 14 7)

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