1: (0 1 15)

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

2: (5 15 21)

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

3: (2 19 11)

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

4: (1 20 15)

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