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

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

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

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

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