1: (3 8 15)

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

2: (0 9 7)

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

3: (2 15 6)

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

4: (1 19 4)

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