1: (0 3 7)

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

2: (7 9 19)

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

3: (6 11 8)

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

4: (2 20 13)

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