1: (0 3 7)

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

2: (5 7 21)

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

3: (4 9 6)

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

4: (3 19 7)

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