1: (2 6 8)

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

2: (0 7 4)

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

3: (2 6 8)

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

4: (1 11 3)

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