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

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

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

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

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