1: (0 5 15)

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

2: (4 18 6)

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

3: (5 17 13)

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

4: (10 16 14)

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