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