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

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

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

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

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