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

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

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

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

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