1: (7 11 15)

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

2: (5 11 9)

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

3: (6 19 8)

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

4: (10 17 14)

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