1: (1 4 20)

(0 20 2)(1 19 4 8 6)(3 10 5)(7 12 9)(11 21 18 16 13)(14 17 15)

2: (4 8 19)

(0 20 2)(1 19 6)(3 10 5)(4)(7 12 9)(8)(11 21 18 16 13)(14 17 15)

3: (3 10 5)

(0 20 2)(1 19 6)(3)(4)(5)(7 12 9)(8)(10)(11 21 18 16 13)(14 17 15)

4: (7 12 9)

(0 20 2)(1 19 6)(3)(4)(5)(7)(8)(9)(10)(11 21 18 16 13)(12)(14 17 15)