1: (1 4 16)

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

2: (0 5 2)

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

3: (4 20 11)

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

4: (6 18 15)

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