1: (0 2 7)

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

2: (1 20 4)

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

3: (2 17 6)

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

4: (3 11 5)

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