1: (2 10 20)

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

2: (0 19 7)

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

3: (1 17 3)

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

4: (2 11 4)

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