1: (0 3 15)

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

2: (2 20 7)

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

3: (4 16 12)

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

4: (1 5 15)

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