1: (1 10 20)

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

2: (0 19 3)

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

3: (1 12 7)

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

4: (8 17 11)

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