1: (5 10 15)

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

2: (9 20 11)

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

3: (5 10 15)

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

4: (4 17 14)

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