1: (0 7 10)

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

2: (6 12 8)

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

3: (9 17 11)

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

4: (5 16 10)

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