1: (0 1 15)

(0)(1 18 15 20 3)(2 21 19 6 4)(5 17 7)(8 16 14 12 9)(10 13 11)

2: (3 15 20)

(0)(1 18 15)(2 21 19 6 4)(3)(5 17 7)(8 16 14 12 9)(10 13 11)(20)

3: (6 21 19)

(0)(1 18 15)(2 21 4)(3)(5 17 7)(6)(8 16 14 12 9)(10 13 11)(19)(20)

4: (5 17 7)

(0)(1 18 15)(2 21 4)(3)(5)(6)(7)(8 16 14 12 9)(10 13 11)(17)(19)(20)