1: (0 1 15)

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

2: (3 15 21)

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

3: (2 19 8)

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

4: (1 20 15)

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