1: (0 7 15)

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

2: (5 17 8)

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

3: (9 18 16)

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

4: (14 19 15)

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