1: (0 15 17)

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

2: (12 18 16)

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

3: (4 19 17)

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

4: (2 20 5)

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