1: (0 3 9)

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

2: (1 20 6)

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

3: (2 18 4)

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

4: (3 15 5)

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