1: (3 8 12)

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

2: (2 11 4)

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

3: (10 12 13)

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

4: (1 9 7)

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