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

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

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

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

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