1: (0 6 7)

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

2: (4 9 6)

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

3: (1 20 8)

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

4: (3 18 5)

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