1: (0 3 7)

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

2: (1 20 6)

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

3: (5 7 9)

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

4: (2 16 4)

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