1: (0 1 17)

(0)(1 20 17 21 3)(2 15 4 19 13)(5 14 11 9 6)(7 10 8)(12 18 16)

2: (3 17 21)

(0)(1 20 17)(2 15 4 19 13)(3)(5 14 11 9 6)(7 10 8)(12 18 16)(21)

3: (2 19 13)

(0)(1 20 17)(2)(3)(4 19 15)(5 14 11 9 6)(7 10 8)(12 18 16)(13)(21)

4: (12 18 16)

(0)(1 20 17)(2)(3)(4 19 15)(5 14 11 9 6)(7 10 8)(12)(13)(16)(18)(21)