1: (1 5 11)

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

2: (0 9 2)

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

3: (1 5 11)

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

4: (3 20 6)

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