1: (5 9 13)

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

2: (8 14 12)

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

3: (7 15 13)

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

4: (4 11 6)

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