1: (4 8 12)

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

2: (6 15 9)

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

3: (11 17 13)

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

4: (4 10 7)

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