1: (0 4 10)

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

2: (1 20 7)

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

3: (3 18 5)

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

4: (4 15 6)

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