1: (5 11 15)

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

2: (4 13 6)

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

3: (10 14 12)

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

4: (0 7 11)

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