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

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

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

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

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