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

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

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

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

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