1: (0 6 7)

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

2: (3 8 6)

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

3: (2 20 4)

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

4: (3 13 7)

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