1: (0 4 7)

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

2: (2 9 5)

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

3: (6 19 8)

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

4: (7 12 15)

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