1: (4 11 15)

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

2: (10 17 12)

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

3: (14 20 16)

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

4: (9 19 15)

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