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

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

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

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

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