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