1: (1 5 15)

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

2: (0 9 2)

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

3: (1 5 15)

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

4: (4 17 6)

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