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

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

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

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

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