1: (0 3 6)

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

2: (2 17 4)

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

3: (1 20 7)

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

4: (3 19 13)

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