1: (0 2 15)

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

2: (1 19 3)

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

3: (2 17 7)

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

4: (12 18 16)

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