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

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

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

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

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