1: (0 3 15)

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

2: (2 20 8)

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

3: (1 5 15)

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

4: (4 14 6)

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