1: (4 7 16)

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

2: (5 18 8)

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

3: (15 19 17)

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

4: (4 14 6)

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