1: (4 10 15)

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

2: (3 14 5)

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

3: (4 13 7)

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

4: (6 12 9)

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