1: (1 8 11)

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

2: (7 13 9)

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

3: (6 16 11)

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

4: (12 17 15)

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