1: (0 3 17)

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

2: (1 20 8)

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

3: (2 16 5)

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

4: (4 17 6)

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