1: (0 3 7)

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

2: (5 7 20)

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

3: (4 13 6)

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

4: (3 14 7)

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