1: (0 3 15)

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

2: (1 19 4)

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

3: (3 16 6)

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

4: (2 20 18)

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