1: (0 3 8)

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

2: (2 19 7)

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

3: (1 5 8)

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

4: (4 12 6)

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