1: (0 2 15)

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

2: (1 20 5)

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

3: (8 21 16)

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

4: (3 15 17)

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