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