1: (0 4 12)

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

2: (3 20 5)

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

3: (4 17 6)

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

4: (8 18 16)

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