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

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

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

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

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