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

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

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

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

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