1: (5 11 15)

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

2: (9 17 12)

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

3: (7 11 10)

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

4: (4 13 6)

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