1: (0 4 7)

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

2: (6 7 9)

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

3: (1 20 8)

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

4: (3 19 5)

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