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

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

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

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

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