1: (0 2 15)

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

2: (1 19 3)

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

3: (2 17 5)

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

4: (12 18 16)

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