1: (0 3 17)

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

2: (1 20 8)

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

3: (2 12 4)

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

4: (3 19 5)

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