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

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

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

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

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