1: (0 1 15)

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

2: (4 15 21)

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

3: (3 17 8)

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

4: (13 18 16)

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