1: (7 10 15)

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

2: (6 12 15)

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

3: (11 16 13)

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

4: (1 15 10)

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