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

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

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

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

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