1: (1 5 16)

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

2: (0 6 2)

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

3: (5 20 8)

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

4: (3 9 7)

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