1: (4 7 12)

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

2: (3 8 6)

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

3: (1 9 7)

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

4: (0 10 2)

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