1: (0 3 5)

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

2: (2 10 4)

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

3: (1 20 5)

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

4: (3 15 6)

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