(0 18 2)(1 19 15 5 3)(4 8 6)(7 20 14 12 9)(10 13 11)(16 21 17)
ALLOWS (11/8)-SEQUENCE
1: (0 4 8)
(0 6 4 18 2)(1 19 15 5 3)(7 20 14 12 9)(8)(10 13 11)(16 21 17)
2: (3 15 5)
(0 6 4 18 2)(1 19 15)(3)(5)(7 20 14 12 9)(8)(10 13 11)(16 21 17)
3: (7 20 14)
(0 6 4 18 2)(1 19 15)(3)(5)(7 12 9)(8)(10 13 11)(14)(16 21 17)(20)
4: (4 18 6)
(0 6 2)(1 19 15)(3)(4)(5)(7 12 9)(8)(10 13 11)(14)(16 21 17)(18)(20)