1: (0 2 15)

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

2: (1 20 3)

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

3: (2 17 4)

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

4: (8 19 16)

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