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

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

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

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

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