1: (4 7 13)

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

2: (5 14 12)

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

3: (3 8 6)

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

4: (2 9 7)

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