1: (0 9 15)

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

2: (7 17 14)

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

3: (6 11 15)

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

4: (10 16 12)

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