1: (0 2 15)

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

2: (1 19 4)

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

3: (2 17 5)

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

4: (13 18 16)

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