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

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

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

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

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