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

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

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

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

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