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