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