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

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

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

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

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