1: (0 5 15)

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

2: (4 18 6)

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

3: (5 17 7)

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

4: (14 20 16)

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