1: (0 10 17)

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

2: (1 20 12)

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

3: (9 13 11)

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

4: (6 10 18)

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