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

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

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

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

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