1: (0 3 12)

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

2: (6 12 21)

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

3: (4 13 7)

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

4: (3 20 12)

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