1: (0 2 15)

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

2: (1 20 5)

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

3: (13 21 16)

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

4: (2 19 6)

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