1: (0 6 7)

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

2: (4 9 6)

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

3: (1 20 8)

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

4: (3 19 5)

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