1: (0 5 15)

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

2: (1 20 8)

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

3: (4 14 6)

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

4: (3 21 15)

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