1: (1 5 15)

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

2: (4 17 6)

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

3: (1 5 15)

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

4: (2 20 16)

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